Tens of thousands of mourners are anticipated to attend a memorial service for Charlie Kirk at State Farm Stadium in Arizona on Sunday. Among those speaking will be Donald Trump and Kirk’s widow, alongside other political figures.

The 31-year-old right-wing commentator was shot and killed during an open-air speaking event at a college campus Utah on September 10.

His death has prompted fierce political debate around upholding free speech and the threat of political violence to American democracy.

The organization Kirk co-founded in 2012, Turning Point USA, announced the public memorial service, inviting fans to honor his ‘remarkable life and enduring legacy’.

The nonprofit, which advocates for conservative politics on American campuses, was born in Arizona and is headquartered in Phoenix.

The state is also where Kirk lived with his wife, 36, and their two children before his death.

Kirk’s casket was transported from Utah to Arizona on board Air Force Two on Thursday, accompanied by JD Vance, Second Lady Usha Vance, and Kirk’s widow, Erika Kirk.

Donald Trump is said to have personally requested the 63,000 capacity home of the Arizona Cardinals to welcome mourners travelling from across the country.

President Trump is expected to attend, along with Vance and Secretary of State Marco Rubio.

Both are expected to speak, along with Erika Kirk, Donald Trump Jr, and Tucker Carlson.

Other Trump administration seniors will attend as speakers, including Robert F. Kennedy Jr., Pete Hegseth, Tulsi Gabbard and Stephen Miller.

American singer-songwriters Chris Tomlin, Brandon Lake, Phil Wickham, Kari Jobe Carnes and Cody Carnes were announced under a separate ‘Worship’ category.

The service will begin at 11am local time (2pm Eastern Time, 6pm GMT).

Michael Bidwell, the owner of the Arizona Cardinals NFL team, told 12News that President Trump personally requested the stadium be used for the service.

Bidwell said he believes the stadium will be set up the way it is for a concert, with a stage on the south side and seating up to the north, 12News’ Troy Hayden reported.

Local law enforcement have said their preparations are on a level usually reserved for major sporting events like the Super Bowl.

Glendale’s police chief said his department is deploying ‘every available resource’, bolstered by reinforcements from neighbouring jurisdictions.

Bomb squads and tactical units will also be on standby for the event.

But it remains to be seen whether the service will be designated as a national special security event, drawing in more resources from the federal government.

Secret Service spokesperson Anthony Guglielmi said in a statement: ‘Joint security planning is underway for the memorial and funeral of Charlie Kirk and appropriate public safety related information will be provided as the process matures in the coming days.’

Jonathan Wackrow, a former US Secret Service agent, told CNN: ‘This location may be seen as an attractive target for a hostile actor because of its visibility. 

‘The potential for it to be disrupted through a series of different threats, or even the threat of a threat, is something that law enforcement really has to focus in on and then put the mitigation protocols in place now.’

Security will be needed to mitigate the possibility of incidents like vehicles ramming into crowds, or biological threats, the outlet reported. Movements could involve the positioning of counter-snipers in and around the arena.

With authorities on high alert, a bomb squad was sent to Turning Point USA’s headquarters on Wednesday morning after a ‘suspicious bag’ was left outside, police said.

The street outside the building was cleared out of precaution. It is unclear what, if anything, was found inside the bag. Authorities said there was not a threat.

Attendees arriving on Sunday, September 21 will be able to park from 7am. The parking lots, with capacity for a fraction of the stadium, will open an hour before the doors.

Indoor overflow will be available next door at the Desert Diamond Arena, organisers say. 

Guests are asked to don their ‘Sunday best’, wearing red, white and blue for the United States.

‘Join us in celebrating the remarkable life and enduring legacy of Charlie Kirk, an American legend,’ Turning Point USA shared on social media. 

The stadium says the event will be ‘first come, first serve’, with event guidance sent out to those who register interest on the evening of Saturday, September 20.

Those registering to attend will have to submit a name, email, phone number and ZIP code. 

All guests will be screened with metal detectors upon entry, and patted down as a last resort. Those who do not consent will be denied entry, they say.

Alcohol, weapons, fireworks, drones, bags and clothing deemed obscene or indecent are all among the long list of prohibited items.

The President asked on Wednesday for all American flags to fly at half-mast until Sunday at 6pm to honour Kirk.

A person familiar with the details told NewsNation that there will also be private events taking place in the days leading up to the service.

Members of Congress and other political figures will hold a prayer vigil at 6pm Eastern Time near the White House and the United States Capitol on Sunday.

Charlie Kirk was killed as he spoke to a crowd at an outdoor ‘Prove Me Wrong’ debate at Utah Valley University on September 10.

Suspect Tyler Robinson, 22, was taken into custody on September 12 and appeared in court for the first time by video link on September 17.

Robinson faces seven charges, including aggravated murder and witness tampering. He did not enter a plea to any of the charges on Wednesday.

Prosecutors are seeking the death penalty ‘based on the available evidence and circumstances and nature of the crime’, they said in a court filing.

Erika Kirk, giving a tearful address after her husband was killed, said: ‘You have no idea the fire that you have ignited within this wife, the cries of this widow will echo around the world like a battle cry.

‘They should all know this: if you thought that my husband’s mission was powerful before you have no idea, you have no idea what you just have unleashed across this entire country and this world.’

She has vowed to continue Charlie Kirk’s mission, announcing that their campus tour will continue through autumn.

‘There will be even more tours in the years to come,’ she said. ‘The movement is not going anywhere, and it will only grow stronger when you join it.’