President Donald Trump and other prominent American political figures are heading to Arizona to speak at a memorial for Charlie Kirk, the 31-year-old conservative activist who was killed two weeks ago.

The event, organised by Turning Point USA (TPUSA), is on Sunday at State Farm Stadium in Glendale and could be attended by more than 100,000 people.

Heightened security is expected, including TSA-level screening, according to TPUSA.

Kirk, who co-founded Turning Point USA when he was 18, was shot at a speaking event on a Utah university campus on 10 September, reigniting concerns about political violence in the US.

A polarising figure, differing perspectives about his legacy and possible motives for the shooting have exacerbated deep divisions in the US.

In addition to Trump, those expected to speak at the service include Kirk's widow, Erika, who took over his role as TPUSA CEO; Vice President JD Vance; the president's eldest son, Donald Trump Jr; right-wing political commentator Tucker Carlson; and homeland security adviser Stephen Miller.

Public shootings in the US are usually met with calls from political leaders for calm, prayer, and unity. However, the Trump administration has been accused of attempting to blame the radical left, raising fears of overreach and civil liberties violations as Kirk's death becomes a focal point in political discourse.

Doors open at 08:00 local time (16:00 BST), with the official program starting at 11:00 (19:00 BST). The stadium can hold just over 63,000 people, with an overflow area available for an additional 20,000 attendees.

Security officials have already encountered incidents leading up to the memorial, including a man impersonating law enforcement who was found armed at the stadium, revealing the heightened tensions surrounding this event.

Much remains unclear about the motives behind Kirk's killing. The suspect, charged with the shooting, has been described as having a leftist ideology, with shell casings displaying anti-fascist slogans discovered by authorities. The implications of these messages continue to stir debate.