A police officer stands atop a hill ahead of a campaign rally with Donald Trump, 2016 Republican presidential nominee, in Cedar Rapids, Iowa, U.S., on Friday, Oct. 28, 2016. Trump enthusiastically greeted the explosive return of Hillary Clinton's private e-mail server to the presidential race just minutes after the Federal Bureau of Investigation announced its decision to review messages newly discovered as part of a separate inquiry. Photographer: Daniel Acker/Bloomberg via Getty Images
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