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Liz Cheney Throws Down Challenge To Veteran Republican

Liz Cheney's campaign to nudge veteran GOP Sen. Mike Enzi into retirement has become an official challenge to his re-nomination. Enzi, 69, has said he is seeking another term. Audie Cornish speaks with NPR's Mara Liasson about the questions Cheney's campaign raises: Will he still run? And what implications does this have for Wyoming, for control of the Senate in 2015 and for women in the Republican Party in the long run?