Donald Trump has said that congressman Steve Scalise, the third-ranking Republican in the House of Representatives, is “in some trouble” following the surgery he received after being shot during a baseball practice.

At a press conference at the White House, Mr Trump described Mr Scalise as a “greater fighter”, while also suggesting that the Louisiana congressman's situation remained very serious.

“It's been much more difficult than people even thought at that time,” Mr Trump said.

MedStar Washington Hospital Centre, where Mr Scalise is receiving treatment, said in a statement the congressman “sustained a single rifle shot to the left hip”, and that he will need additional surgeries. The bullet fractured bones, injured internal organs, and has caused severe bleeding, the hospital said.

Since the shooting, which left members of Congress shaken, several have called for unity to bridge the divide between Republicans and Democrats.

Virginia Shooting Show all 20 1 /20 Virginia Shooting Virginia Shooting House Majority Whip Steve Scalise of Louisiana and others were shot Wednesday at a congressional baseball practice, officials said AP Virginia Shooting Police and emergency personnel are seen near the scene where House Majority Whip Steve Scalise was shot during a Congressional baseball practice in Alexandria, Va AP Virginia Shooting A man receives medical attention from first responders on the scene following a shooting in Alexandria, Virginia, US EPA Virginia Shooting The Republican House majority whip Steve Scalise and at least four others have been shot shot at a congressional baseball game practice session, according to media report EPA Virginia Shooting Police close a street near the scene of a shooting in Alexandria, Virginia EPA Virginia Shooting Police close a street near the scene of a shooting in Alexandria, Virginia, USA EPA Virginia Shooting The Republican House majority whip Steve Scalise and at least four others have been shot shot at a congressional baseball game practice session, according to media reports EPA Virginia Shooting First responders on the scene following a shooting in Alexandria, Virginia, USA EPA Virginia Shooting Alexandria, Va. Police Chief Michael Brown speaks about the shooting in Alexandria, Va AP Virginia Shooting 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 at a Congressional baseball practice AP Virginia Shooting A Capitol Hill Police officer walks past an automobile with the driver's window damaged at the scene of a shooting in Alexandria, Va AP Virginia Shooting Rep. Chuck Fleischmann, R-Tenn. is seen near the scene of a shooting in Alexandria, Va AP Virginia Shooting A Capitol Hill Police officer stands his post at the entrance to the House of Representatives on Capitol Hill in Washington AP Virginia Shooting Law enforcement officers investigate the scene of a shooting near a baseball field in Alexandria, Va AP Virginia Shooting An Alexandria, Va. police officer tapes off an area near the YMCA after a shooting in Alexandria, Va AP Virginia Shooting Sen. Jeff Flake, R-Ariz. walks toward media gathered at the scene of a shooting at a baseball field in Alexandria, Va AP Virginia Shooting The baseball field that is the scene of a shooting in Alexandria, Va AP Virginia Shooting Law enforcement officers gather near a shooting scene at baseball field in Alexandria, Va AP Virginia Shooting Rep. Joe Barton, R-Texas and other members of the Republican Congressional softball team, stand behind police tape of the scene of a multiple shooting in Alexandria, Va AP Virginia Shooting Rep. Mo Brooks, R-Ala. meets with reporters in Alexandria, Va AP

Democrats are still scheduled to face off against Republicans in the annual congressional baseball game – an event that is expected to bring members of Congress together for some fun and good-natured competition in the wake of the attack on the Republicans’ game in Alexandria, Virginia.

Mr Trump also said at the White House that “Steve, in his own way, may have brought some unity to our long-divided country”.

“We've had a very, very divided country for many years, and I have a feeling that Steve has made a great sacrifice, but there could be some unity being brought to our country,” the President added.

Also wounded were a congressional aide and one former aide who now works as a lobbyist, officials said. One Capitol Hill police officer suffered a gunshot wound and another officer twisted an ankle and was released from a hospital, police said. The gunman, identified as James Hodgkinson of Illinois, died of his injuries after a shootout with the police.

“I am proud to live in a country where expressing a strong opinion is a right, and one that I exercise regularly,” Congressman Tim Ryan, who plays shortstop for the Democratic congressional baseball team, told CNN. “And while we may disagree on the direction of the country, we all agree that violence is never the answer.”

“My hope is that in response to this horrific event, we begin to tone down the partisan language that has come to occupy our political dialogue and get back to the issues at hand,” he added. “While Wednesday gave us all a pause, on Thursday we get back to work both on the House floor – and on the baseball field.”

The game, first established in 1909, will be hosted at Nationals Park – just down the road from Capitol Hill.

“It's a chance to take a break from the polarised atmosphere of legislating and just have a little bit of fun with our colleagues in something that's our national pastime,” Congresswoman Linda Sanchez told CBS News. Ms Sanchez has played for 15 years.