
This undated handout photo shows Secret Service agent Julia Pierson. President Obama appoint the veteran agent as the agency's first female director, signaling his desire to change the culture at the male-dominated service, which has been marred by scandal. (Associated Press/U.S. Secret Service)

This undated handout photo shows Secret Service agent Julia Pierson. President Obama appoint the veteran agent as the agency's first female director, signaling his desire to change the culture at the male-dominated service, which has been marred by scandal. (Associated Press/U.S. Secret Service)

**FILE** President Obama (left) walks past a Secret Service agent after welcoming the NCAA college football BCS National Champion University of Alabama Crimson Tide to the South Lawn of the White House to honor their 14th championship on April 19, 2012, in Washington. (Associated Press)

**FILE** President Obama (left) walks past a Secret Service agent after welcoming the NCAA college football BCS National Champion University of Alabama Crimson Tide to the South Lawn of the White House to honor their 14th championship on April 19, 2012, in Washington. (Associated Press)

** FILE ** President Clinton (left) watches as the Chicago Bulls' Michael Jordan tees off at the Las Vegas Country Club in Las Vegas on Monday, July 28, 1997. From left are an unidentified Secret Service agent, Mr. Clinton, Mr. Jordan, Brian Greenspun, former Hawaii Gov. John Waihee and Nevada Gov. Bob Miller. (AP Photo/Ruth Fremson)

** File ** Secret Service Director Mark Sullivan testifies on Capitol Hill in Washington on Dec. 3, 2009. (Associated Press)

** File ** Secret Service Director Mark Sullivan testifies on Capitol Hill in Washington on Dec. 3, 2009. (Associated Press)

GOP Rep. Trey Gowdy of South Carolina, citing terrorism, sponsored legislation to give former U.S. presidents and their wives lifetime Secret Service protection. (Associated Press)

GOP Rep. Trey Gowdy of South Carolina, citing terrorism, sponsored legislation to give former U.S. presidents and their wives lifetime Secret Service protection. (Associated Press)