Most people (except the teabagging set and they were never going to vote Democrat anyway) realize that some deficit spending is necessary to begin the steep climb out of the hole that has been dug for us the past 30 years. Obama has done a good job of telling it how it is instead of painting a pretty picture. As a result, even if there isn't a total 180 by 2010 (there won't), the public isn't going to be too concerned. Most Americans are aware (and experiencing) the realities of the recession and someone who is trying to claim Obama is the cause of their financial ills will backfire.
The GOP has almost fuck all for any kind of attack. I suppose they could keep suggesting Obama doesn't have a birth certificate, general persecution complexes, but I don't see that netting any kind of seats. On the other hand, they will stand to lose quite a few. I doubt Republicans in archconservative areas will have any problems getting re-elected but the ones in hostile waters...