Sen. Tim Kaine Sen. Tim Kaine

Democratic vice presidential nominee, Virginia Sen. Tim Kaine, held a town hall at the Exeter Town Hall in Exeter, N.H., on Thursday afternoon. John Tully for NPR hide caption

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John Tully for NPR

Debbie Wasserman Schultz is stepping down as chair of the Democratic National Committee amid a furor over an email leak that revealed a bias against Bernie Sanders inside the DNC. Bloomberg via Getty Images hide caption

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Bloomberg via Getty Images

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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Alex Wong/Getty Images