Is there a "Palin effect" in polling?

[Brittain33]

Yes, I think it's possible that she would lose by a large margin instead of the ridiculous landslide predicted by polls. Katharine Harris was considered a joke candidate and she closed at the end because of Republicans who supported the party and knew she wasn't going to actually win. Palin, should she become the nominee (which seems very unlikely still, if not impossible), will get lots of votes at the end from partisans who know at least that they wouldn't be making her President but would be making a statement about their beliefs.

[Brittain33]

There are Democrats who I would never want to see in elected office who I would vote for if they were certain to lose and I wanted to register my opposition to the winner's agenda. I'm not sure if Alvin Greene would have qualified, but I could probably think of others. I'm also one of those people who considers "not voting" to not be an option. I expect there are millions of Republicans who would vote that way if Palin were nominated.