I voted for a Republican for any legislative office, or for any federal or state office, exactly once. And it was because I couldn't pinch my nose with a big enough clothespin to be able to vote for his opponent. The Democrat really looked that sleazy.
It was in 1996, when I lived in Chicago. My district was heavily Democratic, but my US Representative was a Republican, Michael Patrick Flanagan. The only reason he had been elected 2 years earlier was that he had run against Dan Rostenkowski, who was indicted (and soon to be convicted) for mail fraud. I had no reason to vote for him other than that he seemed a lesser evil than his opponent.
The opponent's name? Rod Blagojevich.
Of course, Blagojevich won, with something like 2/3 of the vote, which is why I should file this under "I-told-you-so".