Just in case this whole presidency thing doesn't work out this year for President Obama, it's good to know that our current Commander In Chief has something to fall back on. Maybe he and Clinton can put a band together or something. They can call it Presidents of the United States of America. Oh, wait, that's already taken. (Sorry. Couldn't resist.) Anyhow, in case you haven't seen it yet, here's the prez singing a snippet of Al Green's 1971 classic "Let's Stay Together," filmed last night during a fundraiser at the Apollo Theatre.