I recently watched Thirteen Days, a movie about the Cuban Missile Crisis of 1962. Thirteen Days also features actors playing well known politicians. The difference here, of course, is that there's hardly a laugh to be found in Thirteen Days. This movie is played strictly for laughs. I found myself entertained throughout, and even if the whole thing is a bit over the top as a caricature, it does capture something about how we feel about Dubya.
I actually left the theater impressed by Bushy Junior's career trajectory. I mean, if this was your friend, a total drifter and fuck up who then pulled his act together enough to (a) own a baseball team (b) become the governor and then (c) win the presidency, you'd be patting him on the back regardless of his politics. It's true, George W. might be a real American hero!