As if an entire blog dedicated to “an exploration of the graphics and graffiti in support of Barack Obama” wasn’t unnecessary enough, the latest entry is a painting of a nude Obama riding a unicorn done by an artist who “who normally paints photos of people with pancakes on their heads.” I’m sure the Committee for the Preservation of the White House will have a tough time deciding whether that will match the decor better in the Lincoln Sitting Room or the Treaty Room…