Why the conservative message wins. See, Democrats swept into power in the Congress because "the people" knew that what the Republicans were doing wasn't working. So, hey, let's give these other people a try and see how they do it. So how can conservatives run on what is basically Bush Era Economic Policy (you know, the one that got us into so much trouble in the first place) and be gaining traction? Well, the talking heads will say that people really want conservative values and President Obama is taking us away from them, yadda yadda yadda, same old crap. And it's bull. People are back to the "what the people in power are doing isn't working, hey, let's give these people a try and see how they do it." Most people just don't give a good goddamn about monetary policy, taxing strategies (just promise to cut our taxes, though, even if it's on 1% for us and 10% for the 1%), fiscal maturity, or any real economic theory that works.
Conservatives know this (they are working hard at keeping the "low information voters" from not voting, or from becoming informed votes). Progressives, by and large, haven't caught on to the trick. It isn't that conservative policy is "better", it's that it is "different" from what we're doing now (don't confuse them by trying to tell them deficits are down, the current policies will lower them faster than what conservatives are talking about, and taxes are the lowest they've ever been for the vast majority of people still working), and they don't see what we're doing now as working (fast enough). They don't see it as a pendulum swinging. It's just that banging on this side of the TV isn't bringing in the signal better, so we'll try the other side, not understanding that banging the TV won't improve the reception no matter where you hit it.