Scalise was one of five people shot by James Hodgkinson early Wednesday.
"Hey, is that guy OK out there?" the witness asks, at one point, in apparent reference to Rep. Steve Scalise who was badly injured in the shooting.
The shooter was identified as James T. Hodgkinson, a 66-year-old home inspector from IL who had several minor run-ins with the law in recent years and belonged to a Facebook group called "Terminate the Republican Party".
White House press secretary Sean Spicer tweeted that US President Donald Trump and Vice President Mike Pence are aware of the situation in Virginia. "Violence of any kind is unacceptable in our society, and I condemn this action in the strongest possible terms".
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The blaze is likely to be deadlier than a 2009 fire in the city's south , which killed six people, including three children. Some residents initially feared the fire was also terror-related, although authorities discounted that possibility.
He belonged to a Facebook group called "Terminate the Republican Party", and reports of potential contacts with him, by Congressman in the parking lot at the field, say that he was asking about the party affiliation of the legislators who were taking batting practice.
The shooting took place in Alexandria's Del Ray neighborhood, where a number of members of Congress were practicing for the annual charity congressional baseball game set for tomorrow. Scalise is the majority whip who rallies Republican votes in the House of Representatives.
Davis said the congressional game was a great demonstration that Democrats and Republicans could still get along. The popular and gregarious lawmaker is known for his love of baseball and handed out commemorative bats when he secured the No. 3 job of House whip several years ago.
Falisa Peoples was just leaving the YMCA next to the ball field when she saw the shooter open fire. "He was just walking and shooting", she said of the man, whom she described as white and wearing a T-shirt and shorts. Two of the wounded were Capitol Hill police, witnesses said. "Many have been shot, but a lot like me got bloody running for cover", he said.
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Bob Inglis, a Republican former congressman who voted to impeach Bill Clinton in 1998, suggested Trump might be in particularly hot water.
"I am sickened by this despicable act". Also wounded was former congressional aide Matt Mika, who now works for Tyson Foods in its Washington office. "They also said that Steve Scalise had been shot and was on the ground on the baseball field", Childs said.
DeSantis said he did not know whether the man was the shooter.
"It's not easy when you see people around you being shot and you don't have a weapon yourself", Brooks said. She said the officer had gotten out of a parked auto, drawn a handgun and shouted something to the gunman, who then fired.
Other lawmakers were stunned in the aftermath of the event, which raised questions about the security of members of Congress.
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He represents Louisiana's 1st Congressional District. "There must have been 50 to 100 shots fired", he told CNN . Paul told ABC News in a telephone interview that he was in the batting cage when he heard an isolated gunshot.