>>It could be he just thought the change was the right thing to do.

And I agree with him. Winning in Iowa means you can win the Democratic vote in a predominantly white, rural state. That's far from representative of the states he or she would need to win in the general election. Also, straw polls? Really?

You've got a point. I'd like to think Dem voters are better than that, but I'm spectacularly good at being wrong.