I didn't vote for Bush
Means same as "I'm not stupid" or "I wasn't born yesterday".
I know that! I didn't vote for Bush, after all!
I didn't vote for Bush
A way of saying that a person is not insane. Origin: George W. Bush has insanely sent thousands of American troops to the Middle East on a pointless war.
(Man, in underwear, holds up bank. Several members of the SWAT team shouted that he put his gun down.)
Man (panicking): Don't shoot me. I didn't vote for Bush, man. I swear.
Man (panicking): Don't shoot me. I didn't vote for Bush, man. I swear.