at the current president is driving the narrative, romney has cast himself as the pragmatic choice. here is the challenge he faces, according to this week's nbc/"wall street journal" poll. herman cain is leading romney, 27% to 23%. rick perry, a distant third now. but among tea party supporters, the gap is even more lopsided. herman cain has the support of a third of tea partiers, romney only about 21%. so if the predictions are correct and mitt romney wins the nomination, what does that mean for the tea party movement itself? will they reluctantly get behind him or will they perhaps look for a third party candidate? or does the choice of mitt romney say something about the power of the tea party? as "the huffington post" asked in a headline yesterday, will mitt romney kill the tea party? matt kibbe is president of