A new Gallup poll is out and it shows the same thing as every other poll recently taken on this subject: most people would prefer to keep in place tax cuts for the middle class but not extend tax cuts for the rich. So why isn't everyone rushing to embrace this stand? At a minimum, there are three reasons:
In addition, of course, you have district-level dynamics that don't show up in a national poll. If you're campaigning in a district where 55% of the registered voters want to extend the tax cuts for everyone, then that's probably the stand you're going to take. The rest of the country really doesn't matter to you.
Oh — and did I forget venality and cowardice? Stir that into the mix too. Never forget venality and cowardice.