The problem with the Tea Party is that they are fully convinced they will win elections, and once a candidate has been selected to sail under the Republican flag, the same business interests that support the mainstream party will either have to support the Dems (anathema) or go ahead with Plan A and keep on giving money to the 'Republicans', even if they are Tea Partiers.
The GOP will try to shore up its traditional-right base, but the shrieking of the fringe is getting louder and becoming more of a problem for mainstream candidates and for the party (see the recent Karl Rove/ Senate Candidate Christine O'Donnell/ Republican Party upheaval). There will be lots of humble pie served by the tea party, and much handwringing at the results of allowing Dick Cheney free rein for eight years under Bush. The GOP will reap what it sowed under Bush, especially as the positive effects of the medical insurance overhaul are felt, and especially if the US gets tough with the government of Afghanistan and seems to gain the upper hand in even a slight way there. The Republican party will find that you can climb aboard the tiger but then what do you do?
This 'movement' would never have gained the traction it now has unless two black men had attained political prominence in the US, Barack Obama, Democratic US President and Michael Steele, Chairman of the Republican Party. It is based on a bedrock of racism. The arrival almost simultaneously on the political stage of these two black men was like a match to dry brush. It has very little to offer except the kneejerk attitude that Cheney and Rove cynically espoused, and now have seen get completely out of hand. Bet they wish they had got behind McCain for President instead of foisting Palin on him as VP candidate, and leaving him hanging out to dry.