WASHINGTON — Thousands of Republicans will gather in Milwaukee beginning Monday for the party’s presidential nominating convention — a typically joyous occasion that will likely take on a different tone this year after a gunman shot at Donald Trump, injuring him, on Saturday.

Republican National Convention launches Monday amid some grumbling over abortion stance

Trump, who will be formally nominated as the GOP’s presidential nominee on Thursday, still plans to attend the convention and officials stress the four-day event will go on as normal.

The shooting at a rally in Butler, Pennsylvania is being investigated as an assassination attempt and the FBI identified the shooter as Thomas Matthew Crooks, 20, of Bethel Park, Pennsylvania. The U.S. Secret Service “neutralized the shooter, who is now deceased,” the Secret Service said.

Trump, who has been declared “safe” by the Secret Service, posted on social media Sunday morning that he was still looking “forward to speaking to our Great Nation this week from Wisconsin.”

“Thank you to everyone for your thoughts and prayers yesterday, as it was God alone who prevented the unthinkable from happening,” Trump wrote. “We will FEAR NOT, but instead remain resilient in our Faith and Defiant in the face of Wickedness. Our love goes out to the other victims and their families. We pray for the recovery of those who were wounded, and hold in our hearts the memory of the citizen who was so horribly killed. In this moment, it is more important than ever that we stand United, and show our True Character as Americans, remaining Strong and Determined, and not allowing Evil to Win.”

Senior advisors to the Trump campaign Susie Wiles and Chris LaCivita released a statement hours after the shooting on Saturday to say that the former president wasn’t changing his plans.

“President Trump looks forward to joining you all in Milwaukee as we proceed with our convention to nominate him to serve as the 47th President of the United States,” Wiles and LaCivita wrote in a joint statement. “As our party’s nominee, President Trump will continue to share his vision to Make America Great Again.”

Reince Priebus, chairman of the MKE 2024 Host Committee, said in a separate statement that he was “heartbroken that reports indicate that at least one innocent person has been killed and perhaps others have been injured. This horrific violence has no place in America.”

“Guests have already begun to arrive in Wisconsin, and we look forward to working with the Republican National Committee to welcome everyone to Milwaukee this week,” Priebus added.

Political party conventions are designated as National Special Security Events, or NSSEs, and come with extremely heightened security compared to a typical campaign rally.

The Secret Service will have at least two security perimeters around the Fiserv Forum in downtown Milwaukee and the city itself will be swarming with additional federal, state and local law enforcement officers.

The convention will still host speeches throughout the week and the dozens of side events hosted by state Republican Parties and conservative organizations were still expected to continue, though likely with a more somber mood than was planned before the shooting.