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

toggle caption Drew Angerer/Getty Images

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

toggle caption Alex Brandon/AP

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

toggle caption Ricky Rhodes/Getty Images

Cleveland Readies For Protests Ahead Of Potentially Volatile GOP Convention

  • Download
  • <iframe src="https://www.npr.org/player/embed/471728957/471891606" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption Brendan Smialowski/AFP/Getty Images

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

toggle caption Jim Lo Scalzo/EPA /LANDOV