The tea-baggers are largely either poorly educated and/or poorly informed, mostly older "moral majority" types who have been led by the nose into believing all the lying crap the Republicans have spewed over the past several months. Many still believe in "death panels" and the impending, untimely end to grandma. Many still harp on Obama's citizenship, and believe he is some kind of evil communist/fascist. Some believe he is the Antichrist. Some are just flat-out racists. All are bent on "taking back" their country when in fact, nothing has been taken from them.
On the whole, they are mindless dupes – just as were the Christian fundamentalists who were cajoled into backing Bush in 2000 and again in 2004. Most of them got nothing for their trouble except dismissal and derision from the Bush administration once the votes were counted.
The Republicans have no interests beyond their own political survival. That survival, as they see it, necessitates that they toe the line set down by the banks and mega corporations who fill their campaign coffers.
Most of the banks and big corporate interests look upon Obama as a wrench in their gears. The Republicans have been instructed to block Obama at every turn. If Obama praised "Mom and Apple Pie" the Reps would oppose it.
Unless and until the Dems grow a backbone, which doesn't seem likely, the Obama Administration will doubtless continue to go down in flames. The only hope I can see is that this all-out stonewalling of Obama could have unintended consequences as more of the voting public recognizes just how craven the Republicans are, and how this is far more hurtful to the interests of the country than anything coming out of the Obama White House.
The best thing that can be said for most congressional Republicans is that compared to many Democrats, they have far better haircuts and wear better suits. Basically, most fabrics tend to drape better over a tight ass.