This is a truly impressive ad. Rep. Marilyn Musgrave, running for her political life in Colorado's 4th CD, is attacking her Democratic challenger, Betsy Markey, by using a Markey impersonator in an ad. I really don't recall seeing anything like this before.
The possibilities are limitless. Maybe McCain could run an ad in which an Obama impersonator sets bombs next to preschools while screaming "God damn America!" And Obama could run ads in which a McCain impersonator stands there and says, "I'm a stupid moron, with an ugly face, and a big butt, and my butt smells, and I like to kiss my own butt."