President Trump delivered message encouraging unity and perseverance to players and attendees at the Congressional Baseball Game, after a gunman opened fire at a field where Republicans were practicing on Wednesday morning.

"In Washington we have our disagreements, but we all agree that we are here to serve this nation we love and the people who call it home. That's the source of unity," Trump said in the short pre-taped message aired Thursday evening at National Park.

Trump himself did not attend the game due to security and logistical concerns after Majority Whip Steve Scalise and a handful of others were injured when a gunman shot a couple dozen rounds at the GOP team Wednesday morning at a field in Alexandria, Va. The gunman was killed by police.

Trump called Scalise, who has undergone three surgeries and remains in critical condition, a "true fighter." Trump also encouraged prayers for the other injured victims and thanked the Capitol Police and first responders who responded to the incident.

Echoing lawmakers on both sides of the aisle preaching unity since the shooting took place, Trump said, "More than ever, we must embrace it."

He capped his message with three "great" words.

"On this special night, I leave you with three great American words that for generations have torn down barriers, built bridges of unity and have sought to pull us apart, ladies and gentlemen, let's play ball!" he said.