People watch as a band performs before the start of a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)

President Donald Trump and his supporters are paying tribute to conservative activist Charlie Kirk, whose assassination has intensified political tensions in the United States. The 63,400-seat State Farm Stadium in Arizona quickly filled up Sunday with people dressed in red, white and blue, as organizers suggested.

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This is a photo gallery curated by AP photo editors.

Elon Musk, left, waves to supporters alongside former Rep. Matt Gaetz during a memorial for Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Ross D. Franklin)
Posters of conservative activist Charlie Kirk are seen on chairs before his memorial Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
Bryson Levy waits in line before a memorial for conservative activist Charlie Kirk Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Jae C. Hong)
People wait in line before a memorial for conservative activist Charlie Kirk Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Jae C. Hong)
President Donald Trump disembarks Air Force One, Sunday, Sept. 21, 2025, upon arriving at Luke Air Force Base, Ariz., to attend a memorial for conservative activist Charlie Kirk. (AP Photo/Julia Demaree Nikhinson)
People sit inside before the start of a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
People wait in line before a memorial for conservative activist Charlie Kirk Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Jae C. Hong)
A woman is overcome with emotion while watching a Charlie Kirk tribute video during a memorial for the conservative activist Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
A man is overcome with emotion while watching a Charlie Kirk tribute video during a memorial for the conservative activist Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
Dan Beazley stands with a cross at a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
People listen during a worship song before the start of a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
A woman is overcome with emotion while watching a Charlie Kirk tribute video during a memorial for the conservative activist Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)
Attendees react during a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Julia Demaree Nikhinson)
A man holds a Bible outside before a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Jae C. Hong)
A man listens during a worship song before the start of a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Ross D. Franklin)
A poster depicting conservative activist Charlie Kirk is pictured as people attend Kirk's memorial, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/Julia Demaree Nikhinson)
President Donald Trump disembarks Air Force One, Sunday, Sept. 21, 2025, upon arriving at Luke Air Force Base, Ariz., to attend a memorial for conservative activist Charlie Kirk. (AP Photo/Julia Demaree Nikhinson)
People hold up signs during a memorial for conservative activist Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. (AP Photo/John Locher)