Committee Chairman Rep. Jason Chaffetz, R-Utah, listens to testimony during a House Oversight and Government Reform Committee hearing on May 17. Last year, dozens of Secret Service employees improperly accessed files on Chaffetz. Drew Angerer/Getty Images hide caption

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Law enforcement personnel stand south of the White House on Constitution Ave., in Washington, D.C., on Friday,. The White House was placed on a security alert after a Secret Service officer shot a man brandishing a firearm near a security checkpoint on a street outside the White House. Alex Brandon/AP hide caption

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Police stand guard during demonstrations in reaction to a Cleveland police officer being acquitted of manslaughter charges on May 23, 2015, in Cleveland. Ricky Rhodes/Getty Images hide caption

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Cleveland Readies For Protests Ahead Of Potentially Volatile GOP Convention

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Members of the Secret Service follow President Obama as he arrives at Northwestern University in Evanston, Ill., in 2014. Brendan Smialowski/AFP/Getty Images hide caption

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Secret Service Director Joseph Clancy testifies before a Homeland Security Subcommittee hearing on the Secret Service budget Tuesday, when he responded to sharp questions about misconduct by his agents. Jim Lo Scalzo/EPA /LANDOV hide caption

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