The bullet that had hit Scalise was a single rifle round that "travelled across his pelvis, fracturing bones, injuring internal organs, and causing severe bleeding".
"He will be in the hospital for a considerable period of time, presumably weeks", said Jack Sava, trauma director at MedStar Washington Hospital Center, who spoke Friday about the Louisiana Republican who remains in critical condition at the hospital in the District.
Scalise was injured along with four others in the shooting at a Republican congressional baseball practice in Alexandria, Va. Sava said that when Scalise arrived at MedStar, he was in "shock" and had an "imminent risk of death".
Although the weather in Washington looks headed toward a near-flawless summer night, an obvious and immovable shadow is being cast over Thursday night's Congressional Baseball Game - a tradition that began more than a century ago.
Nonetheless, Sava said, "We fully expect him to be able to walk" and "hopefully run".
Sava said he told Scalise's family that "I am not declaring victory until he's playing ball in his back yard with his family".
"He clearly knows they're there and appreciates their presence", Sava said. Also shot were a congressional aide, a lobbyist and a Capitol Police officer. The hospital also said it will continue to provide periodical updates.
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Law enforcement officials identified the shooter as 66-year-old James Hodgkinson of Belleville, Illinois, who later died from injuries sustained during a shootout with police on the scene.
United States politicians are playing in a charity baseball game a day after a shooting - as they practised - wounded a top Republican and three others.
Bailey was spotted on Friday in the Capitol, on crutches and out of uniform, accepting congratulations from fellow officers.
During the friendly competition, a D.C. -area hospital released the following statement about the condition of Rep. Steve Scalise, who was shot Wednesday while practicing for the game with his colleagues.
Trump and his wife Melania visited Scalise in the hospital Wednesday evening, bringing the injured congressman flowers.