Democratic presidential nominee Hillary Clinton speaks to journalists at the New York Historical Society Library in New York City on September 9. Melina Mara/The Washington Post/Getty Images hide caption

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Rep. Debbie Wasserman Schultz (from left), Sen. Marco Rubio and Sen. John McCain. Gaston De Cardenas/AFP/Getty Images; Joe Raedle/Getty Images; Patrick T. Fallon/Bloomberg via Getty Images hide caption

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Sen. John McCain, R-Ariz., and Sen. Marco Rubio, R-Fla., talk on Capitol Hill in 2014. Both are expected to win their primaries for re-election Tuesday. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

Incumbents Poised For Big Wins Despite All The Attention On Outsiders

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Sen. Kelly Ayotte, R-N.H., and Sen. John McCain, R-Ariz., seen here in 2012, are both facing competitive elections in 2016. Charles Krupa/AP hide caption

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How To Lose The Senate In 82 Days

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NPR Battleground Map: Hillary Clinton Solidifies Lead Against Donald Trump

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Texas Tech freshman Regan Elder helps drape a bed sheet with the message "No Means No" over the university's seal at the Lubbock, Texas campus in 2014 to protest what students say is a "rape culture" on campus. Betsy Blaney/AP hide caption

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Donald Trump gives his acceptance speech during the final day of the Republican National Convention, July 21, in Cleveland. Mark J. Terrill/AP hide caption

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Hear A Related Story From Don Gonyea On The Campaign Trail

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President Obama speaks to the media after a meeting with Secretary of Defense Ashton Carter and members of the Joint Chiefs of Staff at the Pentagon on Thursday in Arlington, Va. Mark Wilson/Getty Images hide caption

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Berkshire Hathaway Chairman and CEO Warren Buffett stands at the lectern during a Hillary Clinton campaign event in Omaha, Neb. Clinton waves in the background. Andrew Harnik/AP hide caption

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Andrew Harnik/AP

Clinton Highlights Billionaires' Support As A Way To Try To Undermine Trump

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Democratic presidential nominee Hillary Clinton takes the stage at the Democratic National Convention in Philadelphia Wednesday night following President Obama's speech. Bill Clark/CQ-Roll Call Group via Getty Images hide caption

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California Gov. Jerry Brown speaks at the Democratic National Convention in Philadelphia on Wednesday. Bill Clark/CQ Roll Call via Getty Images hide caption

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Bill Clark/CQ Roll Call via Getty Images

California Gov. Jerry Brown On The Power Of Outsider Politics

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Virginia Sen. Tim Kaine counted health care policy among his chief concerns at a campaign rally for Hillary Clinton in Miami on July 23. Justin Sullivan/Getty Images hide caption

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Sen. Tim Kaine spoke Spanish at a rally earlier this month in Miami, where he was announced as Hillary Clinton's vice presidential running mate. Gustavo Caballero/Getty Images hide caption

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Vice President Joe Biden talks to students from Eagle Academy for Young Men during a walk at the Democratic National Convention on Tuesday. He will speak Wednesday night. Jessica Kourkounis/Getty Images hide caption

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Philly.fyi Executive Director Billy Taylor holds permits to most of the park across from the convention. Jeff Brady/NPR hide caption

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Rallies, Marches And A 'Fart-In': Philadelphia Gets Ready For The DNC

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Democratic presidential candidate Hillary Clinton and Sen. Tim Kaine of Virginia greet the crowd during a campaign event on July 14 in Annandale, Va. Alex Wong/Getty Images hide caption

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