Again, from Moby, some Bush one liners:

"President Bush is supporting Arnold. But a lot of Republicans are not because he is actually quite liberal. Karl Rowe said if his father wasn't a Nazi, he wouldn't have any credibility with conservatives at all."
Bill Maher

"President Bush is on a 35-day vacation, and before he left he had his annual physical, and it turns out his cholesterol now is lower than his approval rating."
David Letterman

"Yesterday, Arnold Schwarzenegger announced he would run for governor of California. The announcement was good news for Florida residents who now live in the second flakiest state in the country."
Conan O'Brien

"Apparently Arnold was inspired by President Bush, who proved you can be a successful politician in this country even if English is your second language."
Conan O'Brien

"They're saying Arnold will get 95% of the vote. At least according to his brother, Jeb Schwarzenegger."
Craig Kilborn

Get them all by going there yourself: link