United States Capitol Police

congressman_shot_51463.jpg

Capitol Hill Police officers stand watch outside the House of Representatives on Capitol Hill in Washington, Thursday, June 15, 2017, a day after a gunman opened fire on a lawmakers playing baseball and wounded House Majority Whip Steve Scalise of La. at a baseball practice in Alexandria, Va. (AP Photo/J. Scott Applewhite)

Congressman_Shot_31254.jpg-4c22f.jpg

Capitol Hill Police officers scan the area on Capitol Hill in Washington, Wednesday, June 14, 2017, after House Majority Whip Steve Scalise of La. was shot during during a congressional baseball practice in Alexandria Va. (AP Photo/Jose Luis Magana)

Congressman_Shot_08008.jpg-4d4cc.jpg

A Capitol Hill Police officer scans the area on Capitol Hill in Washington, Wednesday, June 14, 2017, after House Majority Whip Steve Scalise of La. was shot during during a congressional baseball practice in Alexandria Va. (AP Photo/Jose Luis Magana)

congressman_shot_47120.jpg

Capitol Hill Police officer Nathan Rainey stands guard on Capitol Hill in Washington, Wednesday, June 14, 2017, after House Majority Whip Steve Scalise of La. was shot during a congressional baseball practice in Alexandria, Va. (AP Photo/Manuel Balce Ceneta)

congressman_shot_70620.jpg

A Capitol Hill Police officer stands his post at the entrance to the House of Representatives on Capitol Hill in Washington, Wednesday, June 14, 2017, after House Majority Whip Steve Scalise of La., and others, were injured in a shooting during a congressional baseball practice in Alexandria, Va. (AP Photo/J. Scott Applewhite)

trump_inauguration_97117.jpg

A Capitol Hill police officer watches the crowd before the swearing in of Donald Trump as the 45th president of the United States during the 58th Presidential Inauguration at the U.S. Capitol in Washington. Friday, Jan. 20, 2017 (AP Photo/Andrew Harnik)

trump_attorney_general_55541.jpg

A protester is escorted away by Capitol Hill Police officers, Tuesday, Jan. 10, 2017, in Washington, during the Senate Judiciary Committee's confirmation hearing for Attorney General-designate, Sen. Jeff Sessions, R-Ala. (AP Photo/Alex Brandon)

107_2013_shooting-38201.jpg

Capitol Hill police officers gather near the black Nissan Infiniti after the chase and shooting of Miriam Carey. (Associated Press)

Anti Abortion Protest_Live.jpg

Rives Grogan of Los Angeles, a pastor and anti-abortion protestor, is restrained by Capitol Hill police on Capitol Hill on Dec. 28, 2012, after demonstrating in the Senate Chamber visitor's gallery. (Associated Press)

POW_6573_20121116

A Capitol Hill Police officer stands guard as former CIA Director David H. Petraeus allegedly meets with lawmakers behind closed doors inside the Capitol Visitors Center on Capitol Hill on Washington on Friday, Nov. 16, 2012. (Andrew Harnik/The Washington Times)

PETRAEUS_6366_20121116

A Capitol Hill police officer stops people from entering a hallway on Capitol Hill in Washington, Friday, Nov, 16, 2012, near where the Senate Intelligence Committee was holding a closed-door hearing where former CIA Director David Petraeus testified on the Sept. 11, 2012 attack in Libya. (AP Photo/Cliff Owen)

PETRAEUS_6341_20121116

A Capitol Hill Police Officer stands guard as former CIA Director David Petraeus meets with lawmakers behind closed doors inside the Capitol Visitors Center on Capitol Hill, Washington, D.C., Friday, November 16, 2012. (Andrew Harnik/The Washington Times)

BLUE_20120508_339

Officer Jerry L. Buhaj, center, commander of the ceremonial unit for the United States Capitol Police, salutes as police honor guards pass him to begin the procession into St. Patrick's in the City for the annual Blue Mass honoring law enforcement and public safety officials Tuesday, May 8, 2012 in Washington, D.C. (Barbara L. Salisbury/The Washington Times)

BP_52.jpg

A protester is controlled by a Capitol Hill Police Officer while she calls for BP CEO Tony Hayward to be charged with a crime as he began to testify before the House Energy and Commerce Oversight and Investigations Subcommittee regarding BP's Deepwater Horizon oil rig explosion and oil spill on Capitol Hill in Washington on June 17, 2010. UPI/Roger L. Wollenberg