To cleanse the palate, via National Journal. You know what? He’s not half-bad. And the crowd eats up with a spoon. And yet: He must never do this again. Because if he does it again, other politicians will feel pressure to prove their hipness by doing it too. Do you really want to see John Kerry rap? Then this ends now, my friends.

TPM dug around and discovered that this isn’t the first time The One has felt moved to song while on the trail. I’ve embedded those clips below as well. I’ll say this for him: He has good taste in music, if you don’t count his fondness for songs written about him. Exit quotation from Al Green: “He nailed it.”

Update: It begins.