Sarah Palin

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Former Alaska Gov. Sarah Palin speaks to the gathering for the launch of the two-week Tea Party Express bus tour in Reno on Monday.

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Former Alaska Gov. Sarah Palin speaks to the gathering for the launch of the two-week Tea Party Express bus tour in Reno on Monday.

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ASSOCIATED PRESS Sarah Palin launches a Tea Party Express tour in Reno, Nev., on Saturday.

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No conservative comic counterpart has been found yet to Tina Fey, whose sendup of vice-presidential candidate Sarah Palin in 2008 on "Saturday Night Live" was wildly popular. (Associated Press)

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**FILE** In this photo from Sept. 15, 2010, former Alaska Gov. Sarah Palin appears as the featured speaker at the Oklahoma Council of Public Affairs' annual Liberty Gala at the Convention Center in Tulsa, Okla. (Associated Press)

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Associated Press photographsI IN TANDEM: Former Alaska Gov. Sarah Palin and RNC chief Michael S. Steele are collaborating on GOP fundraising.

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Associated Press photographs The Republican National Committee is helping former Alaska Gov. Sarah Palin pay off legal expenses dating back to her 2008 vice-presidential campaign.

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In this Oct. 25, 2008, file photo, then-Republican vice presidential candidate, Alaska Gov. Sarah Palin, speaks in Des Moines, Iowa. The 2008 GOP vice presidential nominee will be the big draw at Friday's Reagan Dinner in Des Moines, the Iowa Republican Party's biggest fundraiser. The question that will be on everyone's mind is whether she'll run for president in 2012. (AP Photo/Charlie Neibergall, File)

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Kelly Ayotte, a former New Hampshire attorney general who won the endorsement of former Alaska Gov. Sarah Palin, defeated Senate rival Ovide Lamontagne. (AP Photo)

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FILE - In this June 29, 2010 file photo, former Alaska Gov. Sarah Palin speaks to the crowd at the P.U.R.E. Ministries in Duluth, Ga. It's not a real word, but that hasn't stopped "refudiate" from becoming Merriam-Webster's 2010 "Word of the Summer." The publishing company says Sarah Palin's pseudo-word was the most-often searched by users of its online dictionary, The Associated Press reports on Tuesday, Sept. 7, 2010. The former Alaska governor used it twice in July: once on a news show and later on Twitter, in place of refute or repudiate. (AP Photo/Erik S. Lesser, File)

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In Washington state, Clint Didier (shown), who lost the GOP senatorial primary to party favorite Dino Rossi despite the support of former Alaska Gov. Sarah Palin, said Mr. Rossi must meet a list of policy demands before he will endorse him. ASSOCIATED PRESS PHOTOGRAPH

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Former Alaska Gov. Sarah Palin (shown here in Duluth, Ga., in this June 29, 2010, file photo) will speak at an event in Anchorage, Alaska, and probably also at a rally in Wasilla, Alaska, on Sept. 11.

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Brian Murphy for Governor BACKED, BUT BEHIND: Brian Murphy (below) has the endorsement of Sarah Palin, but he still trails former Gov. Robert L. Ehrlich Jr., in Maryland.

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Former Alaska Gov. Sarah Palin and her husband Todd, look on during funeral services for former U.S. Sen. Ted Stevens at the Anchorage Baptist Temple Wednesday, Aug. 18, 2010, in Anchorage, Alaska. (AP Photo/Rick Bowmer)

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Former Alaska Gov. Sarah Palin (right) goes to bat for Georgia gubernatorial candidate Karen Handel at a rally for Mrs. Handel on Monday in Atlanta. Mrs. Handel faces former Rep. Nathan Deal in a runoff Tuesday for the Republican nomination. (Associated Press)

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** FILE ** In this June 29, 2010 file photo, former Alaska Gov. Sarah Palin speaks to the crowd at the P.U.R.E. Ministries in Duluth, Ga. Mrs. Palin has put her money where her mouth is, contributing at least $87,500 to candidates she's endorsed in the last few months. (AP Photo/Erik S. Lesser, file)

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** FILE ** Bristol Palin, daughter of then-Alaska Gov. Sarah Palin, and Levi Johnston attend the Republican National Convention in St. Paul, Minn., in 2008. Miss Palin and Mr. Johnston have called off their second engagement after he told her he may have fathered a baby with another girl. (AP Photo/Charles Rex Arbogast, File)