Former Alaska Gov. Sarah Palin at a rally in West Virgina on Oct. 30, 2010. Randy Snyder/Getty Images hide caption

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Randy Snyder/Getty Images

Mike Murphy on Sarah Palin

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Former Massachusetts Gov. Mitt Romney speaks to the Values Voter Summit, held by the Family Research Council Action, Friday, Sept. 17, 2010, in Washington.  Jacquelyn Martin/Associated Press hide caption

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Jacquelyn Martin/Associated Press