Obama, Romney, Clinton and Bush -- or not: Great presidential impersonators on TV

Obama, Romney, Clinton and Bush -- or not: Great presidential impersonators on TV: Bottoms starred in the Comedy Central show Thats My Bush, plus showed up in The Crocodile Hunter: Collision Course and DC 9/11.

(Comedy Central)

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Timothy Bottoms as George W. Bush

Bottoms starred in the Comedy Central show "That's My Bush," plus showed up in "The Crocodile Hunter: Collision Course" and "DC 9/11."