Law enforcement officers gather near the scene of a shooting near a baseball field in Alexandria, Va., Wednesday, June 14, 2017. (Alex Brandon/AP Photo)
A vehicle is seen with bullet holes in it at the scene of a shooting near a baseball field in Alexandria, Va., Wednesday, June 14, 2017. (Alex Brandon/AP Photo)
Rep. Joe Barton, R-Texas, with Rep. Pat Meehan, R-Pa., left, arrives on Capitol Hill in Washington, Wednesday, June 14, 2017. (J. Scott Applewhite/AP Photo)
People gather near the scene of a shooting near a baseball field in Alexandria, Va., Wednesday, June 14, 2017. (Alex Brandon/AP Photo)
Law enforcement officers stand at the scene of a shooting near a baseball field in Alexandria, Va., Wednesday, June 14, 2017. (Alex Brandon/AP Photo)
Rep. Rodney Davis, R-Ill., still wearing his baseball uniform, describes for reporters on Capitol Hill in Washington, Wednesday, June 14, 2017. (J. Scott Applewhite/AP Photo)
From left, Vice President Mike Pence, Ivanka Trump, daughter of President Donald Trump, and White House Senior Adviser Jared Kushner listen as President Donald Trump speaks. (Andrew Harnik/AP Photo)
President Donald Trump arrives in the Diplomatic Room of the White House in Washington, Wednesday, June 14, 2017. (Andrew Harnik/AP Photo)
President Donald Trump speaks in the Diplomatic Room of the White House in Washington, Wednesday, June 14, 2017. (Andrew Harnik/AP Photo)
The Belleville News Democrat shared a photo of suspect James T. Hodgkinson protesting outside a Belleville, Ill. post office in 2012. (Derik Holtmann/Belleville News Democrat)
The baseball field that is the scene of a shooting in Alexandria, Va., June 14, 2017, where House Majority Whip Steve Scalise of La. was shot at a congressional baseball practice. (Alex Brandon/AP Photo)
This photo uploaded to Facebook 4 years ago shows Alexandria shooting suspect James T. Hodgkinson. (James T. Hodgkinson/Facebook)
A Capitol Hill Police officer walks past an automobile with the driver's window damaged at the scene of a shooting in Alexandria, Va., Wednesday, June 14, 2017. (Cliff Owen/AP Photo)
Alexandria, Va. Police Chief Michael Brown, right, and others walk to speak to the media about the shooting in Alexandria, Va., Wednesday, June 14, 2017. (Alex Brandon/AP Photo)
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. (J. Scott Applewhite/AP Photo)
Rep. Mo Brooks, R-Ala. meets with reporters in Alexandria, Va., Wednesday, June 14, 2017. (Cliff Owen/AP Photo)
In a photo from Tuesday, June 13, 2017, House Majority Whip Steve Scalise, R-La. speaks at a news conference, one day before he was shot at a baseball practice. (J. Scott Applewhite/AP Photo)
Rep. Chuck Fleischmann, R-Tenn. is seen near the scene of a shooting in Alexandria, Va., Wednesday, June 14, 2017. (Cliff Owen/AP Photo)
Capitol Hill Police officers shut down the plaza on Capitol Hill in Washington, Wednesday, June 14, 2017. (J. Scott Applewhite/AP Photo)
Tourists are directed away from the Capitol Building and across the lawn by Capitol Hill Police officers, Wednesday, June 14, 2017. (J. Scott Applewhite/AP Photo)
Rep. Ruben Kihuen posted this photo of House Democrats praying for their Republican colleagues. (Congressman Ruben Kihuen/Faceboook)
Capitol Hill Police Chief Matthew Verderosa, right, with Alexandria, Va. Police Chief Michael Brown, left, meet with the media in Alexandria, Va. (Alex Brandon/AP Photo)
Rep. Jack Bergman, R-Mich. talks on the phone while walking past a damaged vehicle at a shooting scene where House Majority Whip Steve Scalise of La. was shot. (Cliff Owen/AP Photo)
The scene of an early morning shooting in Alexandria, Virginia, June 14, 2017, is shown. (BRENDAN SMIALOWSKI/AFP/Getty Images)
Police and emergency personnel are seen near the scene where House Majority Whip Steve Scalise of La. was shot during a Congressional baseball practice in Alexandria, Va. (Cliff Owen/AP Photo)
Police and emergency personnel are seen near the scene of a shooting during a Congressional baseball practice in Alexandria, Va., Wednesday, June 14, 2017. (Cliff Owen/AP Photo)
Twitter user Joseph Miscavige wrote, ''Active shooter situation during this mornings trip to the Y. Terrifying. Am ok. Sheltered in place & under lockdown.'' (@JoeMiscavige/Twitter)
Twitter user Joseph Miscavige wrote, ''Active shooter situation during this mornings trip to the Y. Terrifying. Am ok. Sheltered in place & under lockdown.'' (@JoeMiscavige/Twitter)
Twitter user Joseph Miscavige wrote, ''Active shooter situation during this mornings trip to the Y. Terrifying. Am ok. Sheltered in place & under lockdown.'' (@JoeMiscavige/Twitter)
Investigators gather near the scene of an opened fire June 14, 2017 in Alexandria, Virginia. Multiple injuries were reported from the instance. (Alex Wong/Getty Images)
A member of the Alexandria Police stands guard near the scene of an opened fire June 14, 2017 in Alexandria, Virginia. Multiple injuries were reported from the instance. (Alex Wong/Getty Images)
Investigators gather near the scene of an opened fire June 14, 2017 in Alexandria, Virginia. Multiple injuries were reported from the instance. (Alex Wong/Getty Images)
A member of the Alexandria Police runs up the street near the scene of an opened fire June 14, 2017 in Alexandria, Virginia. (Alex Wong/Getty Images)
Investigators gather near the scene of an opened fire June 14, 2017 in Alexandria, Virginia. Multiple injuries were reported from the instance. (Alex Wong/Getty Images)
Police are responding to a shooting at a park in Alexandria, Virginia. U.S. Majority Whip Steve Scalise (R-LA) is reported among those shot.