Were Tuesday's decisive primary losses in Missouri and Michigan the beginning of the end for the Tea Party? MSNBC's Keith Olbermann would like to think so. "In race after race," observed Olbermann on Countdown last night, "the Tea Party wing of the Republican Party was unable even to win over the Republican wing of the Republican Party." Princeton professor Melissa Harris-Lacewell joined Olbermann to help take stock of what Tuesday's results mean for the movement as a whole.

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