Colorado Has Sued the Trump Administration 47 Times in 2025

Since President Donald Trump’s second term began in January, Colorado Attorney General Phil Weiser has kept him busy.

Weiser has filed 47 lawsuits against the Trump administration as of December 16, in partnership with other attorneys general across the country. Weiser’s lawsuits largely focus on maintaining Colorado’s federal funding and protecting the rights of Colorado citizens, covering a range of subjects from food assistance and sexual education to disaster relief and medical research.

“In Colorado, it’s 47 lawsuits in 47 weeks,” Weiser said during a press conference on December 16. “We’ve won before, we’ll win again. I wish we lived in a world where the president was following the law, but we’re not. This president seems to act as if he thinks he’s above the law. He’s not.”

The latest lawsuit challenges the Trump administration for suspending two grant programs for electric vehicle charging infrastructure, pausing the allocation of billions of federal dollars.

A previous lawsuit filed in May successfully pushed the Trump administration to resume $5 billion in grants from the National Electric Vehicle Infrastructure program. However, the new lawsuit alleges that the Charging & Fueling Infrastructure program and the Electric Vehicle Charger Reliability & Accessibility Accelerator program are still stuck in limbo.

As a result, projects in Colorado have been put at risk. For example, Weiser’s office pointed to a Colorado State University project to build a network of public hydrogen fueling stations along Interstate 25. The initiative was reportedly awarded nearly $9 million through the Charging & Fueling Infrastructure program, but has received only $1.1 million.

“The president does not have the power of the purse. Congress mandates funds, like it did here. If the president doesn’t spend the funds, that’s illegal,” Weiser said. “We take seriously the need to improve our air quality, to make an energy transition, and to address our climate challenges. …In Colorado, we have real programs on the ground that are suffering because of this administration’s lawless actions.”

Weiser joined California Attorney General Rob Bonta in co-leading the new lawsuit, filed on December 16, which marks California’s 50th lawsuit against the Trump administration this year.

Here’s a rundown of Colorado’s other 46 lawsuits, and how they have each panned out so far:

December 12: Opposing Fee on H-1B Visa Petitions
The federal H-1B visa program allows United States employers to hire highly skilled foreign workers in specialty fields, such as tech and medical industries. Employers typically pay between $1,000 and $7,600 in fees to petition for one of the visas, according to Weiser’s office. But on September 19, Trump issued a proclamation ordering a massive $100,000 fee for new H-1B visa petitions.

Weiser joined a coalition of nineteen states in suing the Trump administration over the new fee. The lawsuit argues that the fee is contrary to Congress’s intent by establishing the H-1B program and that imposing it exceeds the authority of the executive branch.

November 26: Blocking SNAP Eligibility Guidance
Trump’s One Big Beautiful Bill narrowed eligibility for the SNAP food assistance program for certain non-citizens, including those admitted under humanitarian protection programs. On October 31, the U.S. Department of Agriculture issued guidance declaring that all individuals who entered the country through these humanitarian pathways would remain permanently ineligible for SNAP, even after becoming lawful permanent residents.

Weiser and 21 other attorneys general filed a lawsuit challenging the USDA’s guidance, arguing that it misinterprets the One Big Beautiful Bill, and therefore, “illegally rewrites federal rules and threatens to cut off food assistance for people who are fully eligible under the law.”

On December 9, the Trump administration reversed course, issuing new guidance that reaffirmed SNAP eligibility for all lawful permanent residents.

November 25: Fighting Limitations to Housing Services
Weiser joined a coalition of states in suing the U.S. Department of Housing and Urban Development after it changed its Continuum of Care grant program to reduce the amount of grant funds that can be spent on permanent housing and project renewals and withhold funds from states and localities whose approach to homelessness differs from the Trump administration’s.

The lawsuit argues that these changes violate Congress’s intent when it created the grant program, and alleges that HUD violated the law and its own regulations by not receiving congressional authorization or engaging in rulemaking beforehand.

November 4: Challenging Terms to Emergency Management and Relief Funds
Colorado and eleven other states filed a lawsuit alleging that the Trump administration included illegal and “impossible-to-meet” grant terms in two emergency preparedness and disaster relief grant programs, creating “obstacles to obtaining and using the funding allocated by Congress.” Colorado was awarded nearly $29 million in funding from the grants, but has not been able to accept the funds due to the grant terms, according to Weiser’s office.

The lawsuit argues that the terms exceed the federal government’s authority and violate the law and required procedures. It was filed against Secretary of Homeland Security Kristi Noem, the U.S. Department of Homeland Security, the Federal Emergency Management Agency, and Acting FEMA Administrator David Richardson.

November 3: Resisting Restrictions on Public Service Student Loan Relief
On October 31, the U.S. Department of Education finalized a rule granting itself the power to declare agencies or organizations ineligible employers for the Public Service Loan Forgiveness program if they have a so-called “substantial illegal purpose,” such as supporting undocumented immigrants or providing gender-affirming care to transgender youth. The loan forgiveness program, established in 2007, grants government and nonprofit employees student loan relief after ten years of service.

Weiser is co-leading a lawsuit against the Education Department, arguing that its new rule is “unlawful and targeted to punish states and organizations that the administration does not like.”

October 29: Challenging the Relocation of U.S. Space Command HQ
Weiser is suing to challenge Trump’s decision to move the U.S. Space Command from Colorado Springs to Huntsville, Alabama. He notes that Trump publicly cited Colorado’s mail-in balloting system as a “big factor” in his decision to relocate the facility. Weiser argues that punishing Colorado for its voting system illegally encroaches on states’ rights. In addition, the lawsuit claims the Trump administration failed to comply with federal procedures that are required before relocating a major headquarters location.

October 28: Maintaining SNAP Benefits During Government Shutdown
The U.S. Department of Agriculture informed state SNAP agencies on October 10 that it intended to suspend federal food benefits in November, amid the ongoing government shutdown. The lapse in benefits would have impacted more than 600,000 Coloradans who rely on the program, according to the AG’s office.

Weiser joined 22 other attorneys general and three governors in filing a lawsuit, noting that the government is legally required to provide the SNAP benefits and that contingency funds are readily available despite the shutdown. The suit describes the decision to suspend SNAP benefits as “a deliberate, illegal and inhumane choice” by the Trump administration. Meanwhile, the administration released politicized messages blaming the Democrats for the loss of SNAP.

On October 31, a federal judge ruled against the Trump administration, ordering the government to pay SNAP benefits in full. That decision was backed by the U.S. Court of Appeals on November 7. The federal government reopened on November 12.

October 16: Opposing Cancellation of Solar for All Program
In August, the Environmental Protection Agency announced the cancellation of a $7 billion program that was intended to make solar power accessible to low-income households. The Solar For All program was established in 2022, appropriating grants to deploy rooftop and community solar projects nationwide.

Weiser joined 22 other states in a federal district court lawsuit alleging that the cancellation was unlawful, violating the Administrative Procedure Act and the U.S. Constitution’s Separation of Powers Doctrine.

October 16: Recovering Funding for Solar Energy
Weiser also joined a separate lawsuit regarding Solar for All among states that were grant recipients. That lawsuit was filed in the U.S. Court of Federal Claims, seeking damages for the EPA’s alleged breach of its agreement with the grant recipients. After the cancellation announcement, the EPA withdrew around 90 percent of grant funds from the accounts in which states had received the awards, according to the lawsuit.

October 1: Blocking Funding Restrictions for Services to Crime Victims
Weiser is co-leading a multi-state lawsuit challenging the Justice Department’s new rule that prohibits states from using certain federal funds to support crime victims if they are undocumented immigrants. The restrictions apply to grants from the Victims of Crime Act, Byrne Justice Assistance Grants and Violence Against Women Act, which are used to provide services to survivors of domestic violence and other violent crimes.

The lawsuit argues that the restriction is unconstitutional and harms community safety. On October 6, the Trump administration reversed course, dropping its planned restrictions.

September 26: Protecting Funding for Sexual Health Education Programs
Colorado joined a coalition of sixteen states and Washington, D.C., in suing the Trump administration after it threatened to pull sexual education funding from states with curriculum that mentions diverse gender identities. The lawsuit argues that restricting the funding violates the separation of powers by forcing states to rewrite their curricula.

A federal judge issued a preliminary injunction on October 27, blocking the Trump administration from pulling the funding.

August 18: Preserving Access to Crime Victim Grants
Earlier this year, the Trump administration announced that states would not be allowed to access grants from the Victims of Crime Act unless the states support and assist in federal immigration enforcement. This ultimatum was added despite the funds already being authorized by Congress.

Weiser joined twenty other attorneys general in suing over the condition, noting that it disregards the intent of Congress. On October 3, the lawsuit leaders declared victory, announcing that the U.S. Department of Justice dropped its plan to impose the immigration conditions.

August 15: Fighting Funding Cuts for Energy Programs
On May 8, the U.S. Department of Energy announced a new policy to cap indirect and employee benefit costs of state-run energy programs. The change would slash funding for the Colorado Energy Office by hundreds of thousands of dollars according to the AG’s office, leading to cuts to staffing and operations.

Weiser co-led a coalition of nineteen states and Washington, D.C., in a lawsuit to block the Energy Department from imposing the new cap. He argues that federal law requires the Energy Department to negotiate and honor reimbursement rates between states and the federal government.

On September 30, a U.S. District Court judge ruled in Weiser’s favor, finding the cap to be illegal.

July 29: Keeping Planned Parenthood Eligible for Medicaid Funding
Weiser, along with 21 other state attorneys general and Washington, D.C., sued over a Trump administration provision passed in the One Big Beautiful Bill that blocks Medicaid funding for Planned Parenthood locations nationwide for services like cancer screenings, birth control and sexually transmitted infection testing. The lawsuit says the provision defunding Planned Parenthood breaches federal law and would cause undue harm to states.

On December 12, a federal appeals court ruled in favor of the Trump administration, allowing it to continue withholding funding from Planned Parenthood.

July 28: Safeguarding SNAP Data
After the U.S. Department of Agriculture requested the SNAP turn over personal information of participants or risk having funds withheld in May, attorneys general responded with a July 28 lawsuit. The lawsuit argues that the order violates privacy laws, requesting that the courts determine the action is unlawful and prohibit such restrictions on SNAP funding.

A federal judge temporarily barred the administration from collecting the information from the suing states on October 15. However, the Trump administration has continued threatening to withhold SNAP benefits as recently as December 2.

July 21: Protecting Safety Net Programs
In July, the Trump administration prohibited state safety net programs like Head Start and community health centers from serving people who cannot verify their immigration status. In the past, states have been allowed to serve anyone, regardless of immigration status, with those programs. Weiser argues that many such programs don’t even have the capacity or resources to verify immigration status. As a result, many programs will end completely while others will be severely limited by the ruling. Because of this, several state attorneys general sued, calling the prohibition unlawful and asking for immediate relief as the case moves through the court system.

July 17: Preserving Healthcare for 1.8 Million People
Through the HHS Centers for Medicare & Medicaid Services, the Trump administration created a new rule that critics say could kick up to 1.8 million people off health insurance and raise premiums significantly for many who remain covered. Over 300,000 people in Colorado are covered through Medicare and Medicaid, according to Connect for Health Colorado, the state’s insurance exchange.

Weiser and nineteen other attorneys general asked a judge to intervene before the new rule took effect on August 25. On October 1, a federal judge denied their request for a preliminary injunction, calling their concerns and estimates of the prospective coverage losses “overblown.”

July 16: Maintaining Important FEMA Program
The Building Resilient Infrastructure and Communities program housed within FEMA allocates money for states to invest in infrastructure projects that help fortify communities against natural disasters. Earlier this year, the Trump administration canceled the program entirely. Along with nineteen other attorneys general, Weiser sued to reinstate the program, arguing that the president cannot unilaterally cancel the BIRC because Congress established it.

On December 11, a federal judge ruled in favor of Weiser’s coalition, determining that the Trump administration had unlawfully terminated the grant program. He ordered FEMA to promptly reverse its termination.

July 14: Preventing Education Funding Cuts
This Weiser lawsuit seeks to preserve $80 million in federal dollars for education in Colorado. In total, the Trump administration is considering withholding $6.8 billion in education funding nationwide. Affected programs include those that help migratory children and English learners, improve classroom instruction, upgrade technology in classrooms and support community education centers and adult learners.

The lawsuit argues that withholding the funds ignores federal regulations, and asks a court to prevent the funds from being withheld. On August 25, the U.S. Department of Education agreed to release the frozen funds to resolve the lawsuit.

July 1: Blocking ICE from Receiving Medicaid Data
In response to the U.S. Department of Health & Human Services giving ICE and the Department of Homeland Security unrestricted access to personal medical information through Medicaid, Weiser joined other attorneys general to sue. The lawsuit argues that transferring such data is illegal, asking for a judge to prevent any new data transfers for immigration enforcement purposes.

On August 12, a federal court issued a preliminary injunction blocking HHS from using Medicaid data for immigration enforcement in states involved in the lawsuit. The injunction was later extended until January 5.

July 1: Regaining Youth Mental Health Funding
Weiser joined a second lawsuit on July 1, this one suing the U.S. Department of Education for withholding $1 billion in grant funding that had previously been allocated to combat the youth mental health crisis. According to Weiser’s office, around $10 million was appropriated to Colorado between both colleges and high schools. The funding went toward recruitment and retention of mental healthcare professionals in schools throughout the state.

The attorneys general believe there is no legal justification to withhold the funds and asked for a judge to release the money. On October 27, a federal judge ruled that the Trump administration can’t cancel the grants, ordering the restoration of the funds.

June 24: Fighting Federal Funding Cuts by DOGE
According to Weiser’s office, many of the cuts to federal programs made by the Department of Government Efficiency have been justified by a federal rule saying agencies may terminate an award of federal funding if it “no longer effectuates…agency priorities.” The subject of this June 24 lawsuit is questioning that justification.

The lawsuit wants a court to declare that a new presidential administration does not constitute a change in agency priorities. Specifically, the lawsuit asks the court to rule that grants awarded prior to Trump’s election should not be able to be rescinded.

June 16: Maintaining Reimbursements for University Defense Research
On June 13, the U.S. Department of Defense issued a new policy that caps indirect cost reimbursements for all university-based defense research grants. Days later, over a dozen higher education institutions and associations filed a lawsuit, including Colorado State University. The lawsuit argues that the cut would jeopardize research efforts essential to U.S. military preparedness and national security.

On July 24, a federal judge granted a preliminary injunction preventing the Department of Defense from enforcing the cap on the universities named in the lawsuit.

June 12: Upholding Colorado’s Clean Air Standards
Colorado, following California’s suit, has stronger standards for vehicle emissions than the federal government requires. Under Trump’s direction, the EPA has moved to rescind waivers granted to California that allow those more stringent standards. This lawsuit seeks to keep the waivers in place and continue to allow states to regulate vehicle emissions as they see fit.

June 9: Maintaining Machine Gun Conversion Ban
After the Trump administration made plans to redistribute devices called forced reset triggers (FRTs) that make semiautomatic weapons work like machine guns, Weiser and other attorneys general sued the Bureau of Alcohol, Tobacco, Firearms & Explosives. Before May 16, the ATF had classified those devices as machine guns, which made FRTs against federal law. However, the White House then directed the ATF to stop enforcing that law and give back previously seized FRTs. As a result, the lawsuit asked the ATF to stop redistributing the devices as doing so is a violation of federal law, and could contribute to violations of state laws banning FRTs.

In mid-July, the Trump administration agreed not to distribute the devices in Colorado and fifteen other states where they are illegal under state law.

May 28: Protecting the National Science Foundation
The National Science Foundation cut funding for projects related to increasing the participation of women, minorities, and people with disabilities in STEM while also randomly capping the indirect costs of research projects at 15 percent. In response, Weiser and other attorneys general filed a lawsuit arguing that Congress should be in charge of the NSF rather than Trump while also seeking an order declaring the funding cuts and caps illegal.

On August 1, a New York judge declined a preliminary injunction to rescind the funding cuts. The judge ruled that the states hadn’t done enough to show the action was out of bounds, and to let the lawsuit continue to play out without temporary relief.

May 13: Refusing to Comply with Federal Immigration Crackdowns
On May 13, Weiser and nineteen other attorneys general filed two lawsuits over the same issue: the federal government attempting to force states to comply with federal immigration enforcement work to receive federal funding. The first lawsuit is against FEMA, the U.S. Department of Homeland Security and Defense Secretary Kristi Noem.

On September 24, a judge ruled in favor of Weiser in the lawsuit against FEMA.

May 13: Refusing to Comply with Federal Immigration Crackdowns
This lawsuit is against the U.S. Department of Transportation and Secretary Sean Duffy, which tried to stop issuing federal funds if local governments didn’t conduct the immigration work desired by the Trump administration.

A Rhode Island judge issued a preliminary injunction on June 23 in the lawsuit against the Department of Transportation, writing that the department cannot withhold funding over a lack of immigration enforcement by states.

May 7: Maintaining Funding for Electric Vehicle Infrastructure
In 2022, Congress passed an act appropriating over $5 billion in funds to build infrastructure for electric vehicles across the country. According to Weiser’s office, tens of millions of those dollars are meant to be used in Colorado, but Trump issued an executive order taking back the funding, including for projects that were already approved. Weiser’s lawsuit aimed to restore the infrastructure funding.

In late June, a judge issued a preliminary injunction for every state involved in the lawsuit except for Vermont, Minnesota and the District of Columbia. In August, the federal government backed down, reopening the $5 billion funding program.

May 5: Preventing the U.S. Department of Health & Human Services from Being Dismantled
According to Weiser’s office, over 10,000 HHS workers were terminated on April 1 alone as part of a restructuring that the lawsuit argues has caused chaos across the nation’s healthcare system. The coalition of attorneys general is asking the court to halt the mass firings and the restructuring while re-establishing critical health services that have been dismantled.

On July 1, a Rhode Island judge issued a preliminary injunction preventing any further cuts or actions to implement the restructuring.

May 5: Preserving Wind Energy
On January 20, the Trump administration issued a memorandum on federal approvals for wind energy projects, effectively shuttering wind energy development. On May 5, Weiser and eighteen other attorneys general responded by suing the Trump administration. The attorneys argued their states should be allowed to pursue reliable energy generation projects and that Trump did not offer a reasoned explanation for the blockages.

On December 8, a federal judge ruled against the Trump administration, throwing out the indefinite halt on wind energy project permitting.

April 29: Protecting AmeriCorps From Federal Cuts
The lawsuit opposes the results of a February executive order by Trump directing federal agencies to reduce their workforces, which led to a 90 percent reduction in the AmeriCorps workforce. AmeriCorps is a service program where members undertake projects in exchange for a small stipend and scholarships for higher education. In Colorado, AmeriCorps members work in wildfire mitigation, education and trail restoration, among other tasks that span the entire state.

Weiser and his fellow attorneys general argue that because Congress appropriated the funding for AmeriCorps, Trump does not have the authority to shut down the program. On June 5, a Maryland judge ruled that Trump did not have the authority to take funding from AmeriCorps and reinstated grant funding to the organization. However, the judge ruled that Trump did have the authority to require workforce cuts.

April 27: Upholding Civil Rights in Education
On April 3, the U.S. Department of Education issued a new interpretation of Title VI of the Civil Rights Act regarding diversity, equity and inclusion. The DOE said states would have to follow the definition or lose federal funding to schools.

But, according to a lawsuit filed by Weiser and eighteen other attorneys general, the new definition isn’t fully explained and is meant to be gleaned from parsing several executive orders designed to eliminate what the Trump administration sees as “illegal” and “radical” DEI policies. The lawsuit seeks to ban the DOE from withholding funding based on the new interpretation of Title VI.

April 23: Preventing Trump Tariffs
The Trump administration is imposing sweeping tariffs on most countries in the world, including 25 percent tariffs on Canada and Mexico, America’s top trading partners. But if thirteen attorneys general, including Weiser, have their way, those tariffs will be reversed.

The group filed a lawsuit arguing only Congress has the power to impose tariffs and that the Trump administration hasn’t shown that there is an “unusual and extraordinary threat,” which is required if the president is to step in and make a decision on tariffs. No president has ever done so, the lawsuit adds.

In May, a U.S. Court of International Trade judge blocked Trump’s move to implement tariffs without authorization from Congress. Since then, Trump has challenged that ruling and is currently able to levy tariffs. The Supreme Court is expected to issue a ruling in early 2026.

April 4: Calling Out the Feds for Stalling Grant Reviews for Medical Research
Weiser, along with fifteen other state attorneys general, filed a lawsuit against HHS Secretary Robert F. Kennedy Jr. and federal health agencies for delaying grant funding for medical research by dragging their feet on the grant review process. According to the lawsuit, the National Institutes of Health has cancelled meetings of the two groups that usually review grants, effectively blocking billions of dollars worth of medical research. The lawsuit asks the U.S. District Court of Massachusetts to require the NIH to resume the regular process of grant review.

In June, the Massachusetts court ruled in favor of the plaintiffs, saying the delays and revoked grants were “arbitrary and capricious.” The Trump administration is appealing the decision.

April 4: Supporting Libraries, Museums and Minority-Owned Businesses
On the same day he sued for blocking medical research, Weiser joined a lawsuit opposing a Trump executive order that would dismantle the Institute of Museum & Library Services and the Minority Business Development Agency. The order would also shutter the Federal Mediation & Conciliation Service, which helps resolve labor disputes. According to Weiser, History Colorado – the state history museum – could have lost over $330,000 in promised federal funding.

On November 21, a federal judge ruled that the Trump administration’s actions were unlawful, blocking it from dismantling the agencies.

April 3: Safeguarding Election Processes
In partnership with U.S. Attorney General Pam Bondi, Trump announced sweeping changes to elections that would restrict voting by requiring documentary proof of citizenship when people register to vote and requiring states to change their mail-in voting procedures. Weiser and nineteen other attorneys general sued, arguing the order is unconstitutional because the Constitution specifically grants the oversight of elections to states rather than the federal government. Colorado is known for having an excellent election system, according to Weiser’s announcement of the lawsuit.

The lawsuit asks a judge to rule that several provisions of the executive order are unconstitutional, and to block them from being implemented. For now, a Massachusetts judge has issued a preliminary injunction blocking many provisions of Trump’s executive order, ruling that the executive branch cannot require documentary proof of citizenship or change how states handle mail-in voting.

April 1: Suing RFK Jr. for Terminating Public Health Grants
When HHS Secretary Robert F. Kennedy Jr. announced cuts to $11 billion in grant funding for programs aimed to improve public health on March 24, Kennedy said the cuts came because the COVID-19 pandemic is over.

Weiser and other AGs quickly replied, arguing that the grant terminations were made in error as the government had actually declared the pandemic over a year ago and Congress had still appropriated the grant funds. According to Weiser, Colorado could lose over $229 million from the grant cancellations. The lawsuit asked for a temporary restraining order preventing the cuts.

On June 16, a federal judge ordered that the grants be reinstated and ruled that the terminations were illegal in the first place.

March 13: Preserving the U.S. Department of Education
On March 11, the Trump administration announced a shutdown of the U.S. Department of Education. Weiser and twenty other attorneys general sued to preserve the department, arguing the destruction of the agency would hurt millions of students across the country. Colorado specifically received over $1.2 billion from the federal government for school-related programs, Weiser added in his announcement of the lawsuit.

The coalition sought a court order to stop the administration from cutting the department’s workforce and thereby dismantling the DOE. On May 22, a Massachusetts judge issued a preliminary injunction prohibiting the shutdown of the DOE and ordering any employees who had been fired to be reinstated. However, the Supreme Court reversed that decision on July 14, allowing the cuts to move forward.

March 6: Saving Teacher Preparation Grants
Because there is a shortage of teachers across the country, Congress established the Teacher Quality Partnership and Supporting Effective Educator Development grant programs to help train and recruit teachers. The Trump administration attempted to terminate $600 million in grant funding allocated to those programs. According to Weiser’s office, the cuts included $2.8 million for a Colorado program dedicated to solving the teacher shortage in rural parts of the state.

Weiser and a coalition of other attorneys general sued to block the termination of the funding, arguing the administration did not have the authority to do so. On March 10, a Massachusetts judge granted the group a temporary restraining order reinstating the grant program. However, the Supreme Court reversed the Massachusetts ruling, allowing the grant funding to remain frozen while the case plays out.

March 6: Opposing Federal Layoffs
March 6 was a busy day for Weiser: After opposing Trump’s grant withholding, the state AG’s office sued the Trump administration for laying off probational federal employees illegally.

The lawsuit argued that proper procedure wasn’t followed when the administration laid off thousands of federal employees. Employees are meant to be given sixty days’ notice and information about how to apply for unemployment benefits. Additionally, if more than fifty federal employees in a state are fired, the federal government is required to notify the state. The Trump administration did not comply with either regulation, according to the lawsuit.

In April, a Maryland judge ordered the Trump administration to reinstate probationary federal employees who had been laid off.

February 19: Maintaining Gender-Affirming Care
When Trump threatened to cut funding to institutions and prosecute medical professionals for providing gender-affirming care in an executive order, the University of Colorado Anschutz Medical Campus stopped providing puberty-delaying medications and hormone therapies to patients. Denver Health and Children’s Hospital Colorado also rolled back gender-affirming care programs. On February 19, Weiser joined a lawsuit seeking to block the executive order.

The lawsuit argued the executive order violates the principles of equal protection under the Constitution as the order singled out transgender people. A U.S. District Court of Washington judge quickly agreed that the order “blatantly discriminated” against transgender youth. By January 20, Denver Health and Children’s Hospital Colorado both announced they would reinstate components of their previous gender-affirming care policies.

February 10: Challenging Cuts to Medical Research
After the Trump administration announced cuts to indirect cost reimbursements at every research institution throughout the country, Weiser and other attorneys general sued the Trump administration, the U.S. Department of Health & Human Services and the National Institutes of Health. Indirect cost reimbursements cover lab, faculty, infrastructure and utility costs to conduct biomedical research. Without the reimbursements, necessary medical research could be put to an end, according to the lawsuit.

According to Weiser’s office, the cuts would eliminate nearly $90 million in funding across Colorado State University, the University of Colorado Anschutz Medical Campus and the University of Colorado Boulder.

On March 5, a federal district court judge blocked the cuts with a preliminary injunction.

February 7: Keeping DOGE Out of Private Data
On February 2, the U.S. Treasury Department issued a new policy allowing members of the Department of Government Efficiency to access the Treasury’s central payment system. Usually, that payment system can only be accessed by limited career civil servants as it contains access to Social Security payments, veterans’ benefits and Medicare and Medicaid payments, among other private information.

Along with Weiser, eighteen other attorneys general sued, arguing that the new policy violates the law governing who can access the central payment system. The group asked for an injunction prohibiting expanded access to the system. On February 14, a judge in New York granted a temporary order blocking DOGE access to the system.

However, on August 12, an appeals court reversed the temporary injunction, ruling that DOGE can access the sensitive federal data.

January 28: Objecting to Federal Funding Freezes
On January 27, the Trump administration moved to withhold trillions of dollars in federal funds from states, research groups and nonprofits. Weiser joined a coalition of attorneys general to file a lawsuit on January 28, objecting to the funding freezes on the grounds that the executive branch cannot take back funding appropriated by Congress. Two days later, a U.S. District Court judge blocked the funding freezes until the court could make a more permanent decision. On February 28, the coalition specifically sued again over freezes to FEMA funds.

On March 6, a federal judge ordered the release of all the funds in question, requiring proof that the FEMA funds had been unfrozen by March 14.

January 21: Upholding Birthright Citizenship
In response to Trump’s executive order repealing birthright citizenship filed the day he took office, Weiser joined nineteen other states and cities in suing to invalidate the order. The lawsuit argued that birthright citizenship has existed in the United States for centuries and been upheld by the Supreme Court twice since the Fourteenth Amendment was ratified in 1868. Multiple judges have since blocked enforcement of the executive order as the legal challenge makes its way through court.

On December 5, the Supreme Court announced it will decide whether the restrictions on birthright citizenship are constitutional.