Barack Obama made light of his "lipstick on a pig" remark on Wednesday's Late Show With David Letterman , calling the hype part of the “silly season” in politics. “It’s a common expression -- at least in Illinois,” Obama said of the remark. “I don’t know about New York City, I don’t know what you guys put lipstick on here. “But in Illinois, the expression connotes the idea that if you have a bad idea, in this case I was talking about John McCain ’s economic plans, that ...