Conservative activist Charlie Kirk’s memorial service will take place on Sunday, little more than a week after his murder sent shockwaves through American politics.

President Donald Trump, Vice President JD Vance and several top administration officials are slated to speak at the event, which is being held at State Farm Stadium in Arizona and is expected to draw tens of thousands of mourners.

Kirk was fatally shot on Sept. 10 in front of a large crowd at Utah Valley University, the first stop of Kirk’s “The American Comeback Tour” that invited students to debate him on hot-button issues.

President Trump announced Kirk’s death that night, and a manhunt ensued for the gunman. Authorities on Sept. 12 identified 22-year-old Tyler Robinson as the suspect. Robinson was charged this week with multiple counts, including aggravated murder. Prosecutors said they intend to seek the death penalty.

Kirk, 31, founded Turning Point USA at age 18 and rose to become one of the most prominent conservative voices in the country. His influence, particularly with young people, helped propel Trump to office. But some of his comments on gun violence, LGBTQ issues, race and more often drew criticism from liberals and others.

A top ally to Trump and a close friend to many in the administration, Kirk’s killing rattled many inside the White House.

The president said he will posthumously award Kirk the Presidential Medal of Freedom, the nation’s highest civilian honor. Vance escorted Kirk’s casket from Utah to Arizona on Air Force Two.

Kirk is survived by his wife Erika and their two young children. Erika Kirk, who has been elected to replace her husband as the CEO for Turning Point USA, vowed “the movement my husband built will not die.”

“No one will ever forget my husband’s name, and I will make sure of it,” Erika Kirk said in emotional remarks days after his death. She will also speak at Sunday’s service.

Other high-profile figures who are scheduled to deliver remarks include Donald Trump Jr., Tucker Carlson, Defense Secretary Pete Hegseth, Secretary of State Marco Rubio, Director of National Intelligence Tulsi Gabbard, Health and Human Services Secretary Robert F. Kennedy Jr., White House chief of staff Susie Wiles and White House deputy chief of staff Stephen Miller.

Attendees have been asked to wear red, white or blue to the service.

The memorial event has been designated as a Special Event Assessment Rating (SEAR) Level 1 event by the Department of Homeland Security, meaning it will have the same level of security as the Super Bowl or the Boston Marathon.

Local officials said they wouldn’t be surprised if more than 100,000 people gather for the memorial.

Kirk’s death was met with bipartisan condemnation from public officials, as top lawmakers on both sides of the aisle raised alarm about the rising tide in acts of violence against public officials.

President Trump vowed to go after individuals and groups he claims contribute to political violence, though has predominately blamed the “radical left” as a problem and not acknowledging recent attacks against Democrats.

Vice President Vance and several administration officials are calling for punishment for people who they say have celebrated Kirk’s death or mocked him online. Some prominent MAGA figures have gone so far as to say Kirk’s death means “war.”

Democrats have pushed back on the rhetoric. Sen. Chuck Schumer, the Senate’s top Democrat, blasted Trump’s “finger-pointing” and said it won’t help turn down the temperature. Critics have called the conservative call for a crackdown on Democrats a threat to free speech.