When the gunfire stopped, he hurried onto the field and used his hands to cover a bullet wound to the left hip of House Majority Whip Steve Scalise, a Republican from Louisiana.
"Five people were transported medically from the scene", Alexandria police chief Michael Brown told a press conference.
Five people, including the shooter, have been taken to local hospitals for treatment.
Sessions denies improper collusion with Russians
Sessions recused himself from the Russian Federation investigation in March after the revelations of the two Kislyak meetings. In March he acknowledged he met twice previous year with Russia's ambassador to Washington , Sergei Kislyak.
June 14, 2017I urge the nation to keep Rep. Scalise and all injured in their prayers today.
He repeatedly praised the Capitol Police officers and first responders who quickly mobilized to the softball field where the Republican baseball team was practicing ahead of Thursday night's charity game against a Democratic team.
The Capitol Police officers, members of Rep. Scalise's security detail, immediately returned fire. They received fire and returned fire, their actions being called heroic, and the Federal Bureau of Investigation says if they weren't there, that the situation would have been much worse.
That call was echoed by House Speaker Paul Ryan, who said "an attack on one of us is an attack on all of us". Authorities, meanwhile, have not yet said whether there was a motive behind the shooting. A Capitol Police officer "was using our dugout as kind of a shelter to fire on the gunman, and I kept yelling 'Are you friendly? The other patient is in good condition".
Illinois Representative Adam Kinzinger was not at the baseball practice this morning.
Sessions brands Russia collusion claims a 'detestable lie'
Trump vehemently denies any collusion between himself or any of his associates and Russian Federation . Adam Schiff, D-Burbank, is the ranking member on the House Permanent Select Committee on Intelligence.
In this May 17, 2017 photo, Majority Whip Rep. Steve Scalise, R-La., speaks with the media on Capitol Hill in Washington.
The shooting occurred around 7:30 a.m. on Wednesday just outside of Washington, DC.
Following the Giffords shooting, lawmakers have held fewer open town halls and have been advised to increase security at such events.
Ms Reba Winstead lives across the street from the parking lot of the field where the shooting occurred.
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Comey was sacked last month amid his agency's probe into possible collusion between the Trump campaign and the Russians. According to legal experts, Trump could indeed silence Comey by invoking executive privilege to stop his testimony.