Letterman took on Rahm Emanuel last night after it was reported the the Chief of Staff, while naked, confronted Eric Massa in the gym showers. Counting down the "Top Ten Signs That Rahm Emanuel Is Nuts," Letterman showcased some glaring indications that the nude confrontation was not an isolated incident. Turns out this is a guy who's not to be messed with. A guy who eats cigarettes and berates staplers. He's nuts.