Nancy Pelosi

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House Minority Leader Nancy Pelosi has the highest "warmth rating" among congressional leaders. (Associated Press)

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House Minority Leader, Democrat Nancy Pelosi of California, speaks at a Capitol Hill news conference in Washington, June 27, 2013. (Associated Press) ** FILE **

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** FILE ** House Minority Leader Nancy Pelosi of Calif. speaks to reporters on Capitol Hill in Washington, Thursday, July 11, 2013. (Associated Press)

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House Minority Leader Nancy Pelosi tweeted this photo in honor of George H.W. Bush's birthday.

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**FILE** Democratic House Leader Nancy Pelosi speaks at an event presented by the University of Arkansas Clinton School of Public Service in Little Rock, Ark., on May 2, 2013. (Associated Press)