GLENDALE, Ariz. (AP) — President Donald Trump praised Charlie Kirk as a “great American hero” and “martyr” for freedom as he and other prominent conservatives, like Governor Jeff Landry, gathered Sunday evening to honor the slain conservative political activist whose work they say they must now advance.

The memorial service for Kirk, whom Trump credits with playing a pivotal role in his 2024 election victory, drew tens of thousands of mourners, including Vice President JD Vance, other senior administration officials and young conservatives shaped by the 31-year-old firebrand.

“He’s a martyr now for America’s freedom,” Trump said in his tribute. “I know I speak for everyone here today when I say that none of us will ever forget Charlie. And neither now will history.”

Speakers highlighted Kirk’s profound faith and his strong belief that young conservatives need to get married, build families and pass on their values to keep building their movement. They also repeatedly told conservative activists, sometimes in confrontational tones, that the best way to honor Kirk was doubling down on his mission to move American politics further to the right.

“For Charlie, we will remember that it is better to stand on our feet defending the United States of America and defending the truth than it is to die on our knees,” Vance said. “My friends, for Charlie, we must remember that he is a hero to the United States of America. And he is a martyr for the Christian faith.”

Kirk’s assassination at a Sept. 10 appearance on a Utah college campus has become a singular moment for the modern-day conservative movement. It also has set off a fierce debate about violence, decency and free speech in an era of deep political division.

People began lining up before dawn to secure a spot inside State Farm Stadium west of Phoenix, where Kirk’s Turning Point organization is based. Security was tight, similar to the Super Bowl or other high-profile event. The speakers delivered their tributes from behind bullet-proof glass.

The 63,400-seat stadium quickly filled with people dressed in red, white and blue, as organizers suggested.

Kirk’s widow, Erika, in her own address said in the midst of her grief she was finding comfort that her husband left this world without regrets. She also said she forgives the man who is charged with killing him.

“My husband, Charlie, he wanted to save young men, just like the one who took his life,” said Erika Kirk, who is taking over as Turning Point’s leader. She added, “I forgive him.”