Sarah Palin

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Sarah Palin remains a devoted voice for the tea party movement but has lost political stock since her 2008 Republican vice presidential candidacy. Still, she insists she is more committed than ever to the cause of upsetting the party's establishment. (Associated Press)

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Former Gov. Sarah Palin speaks at a rally for Republican presidential candidate Donald Trump during a campaign event, Saturday, April 2, 2016, in Racine, Wisc. (AP Photo/Paul Sancya)

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In this Feb. 26, 2015, file photo, former Alaska Gov. Sarah Palin speaks during the Conservative Political Action Conference (CPAC) in National Harbor, Md. (AP Photo/Cliff Owen, File)

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Former Alaska Gov. Sarah Palin speaks during the Conservative Political Action Conference (CPAC) in National Harbor, Md., on Feb. 26, 2015. (Associated Press) **FILE**

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Sarah Palin attends the SNL 40th Anniversary Special at Rockefeller Plaza on Sunday, Feb. 15, 2015, in New York (left), Bristol Palin arrives for the White House Correspondents Dinner Saturday, April 30, 2011 in Washington. AP Photos

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Actor Eddie Murphy and former Gov. of Alaska, Sarah Palin, greet each other on the red carpet at the SNL 40th Anniversary Special at Rockefeller Plaza on Sunday, Feb. 15, 2015, in New York. (Photo by Evan Agostini/Invision/AP)

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In this Sept. 13, 2008 photo released by NBC, Tina Fey portrays Alaska Gov. Sarah Palin, left, and Amy Poehler as Sen. Hillary Clinton during a skit on "Saturday Night Live" in New York. (AP Photo/NBC, Dana Edelson)

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Former Alaska Gov. Sarah Palin is one of many Republicans slated to attend the inaugural Iowa Freedom Summit later this month in Des Moines. (Associated Press)

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A series of photos posted to Sarah Palin's Facebook page showed her son, Trig, standing on the family dog.

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In this Sept. 26, 2014, file photo, former Alaska Gov. Sarah Palin and former vice presidential candidate speaks in Washington. (AP Photo/Manuel Balce Ceneta, File)

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In a surprise move, former Alaska Gov. Sarah Palin has endorsed the state's "unity" ticket rather than Republican Gov. Sean Parnell. (AP Photo/Manuel Balce Ceneta, File) — FILE

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FORMER ALASKA GOVERNOR AND REPUBLICAN VICE PRESIDENTIAL NOMINEE SARAH PALIN - Sarah Palin waves as she walks off-stage after addressing the Conservative Political Action Committee annual conference in National Harbor, Md., Saturday, March 8 ,2014. Saturday marks the third and final day of the annual Conservative Political Action Conference, which brings together prospective presidential candidates, conservative opinion leaders and tea party activists from coast to coast. (AP Photo/Cliff Owen)