Thousands of people attended Charlie Kirk’s memorial service including President Donald Trump and conservative leaders.

President Donald Trump and his supporters are set to pay 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,

U.S. President Donald Trump speaks as he arrives in Arizona to attend a memorial service for slain conservative commentator Charlie Kirk at State Farm Stadium, at Luke Air Force Base, Arizona, U.S., September 21,

A drone view shows people gathering to pay tribute to slain conservative commentator Charlie Kirk at the headquarters of Turning Point USA, ahead of a memorial service for him which is to be held on September 21,

Scenes from the packed stadium in Arizona, where crowds dressed in red, white and blue paid tribute to the slain conservative activist.

Tens of thousands of mourners, including President Donald Trump, honored the life of slain conservative activist Charlie Kirk.

Thousands of mourners, including President Donald Trump, attend the memorial service for conservative activist Charlie Kirk on Sunday.

Some called Charlie Kirk a modern martyr. Others said his death was a pivotal moment for the U.S. The potent blend of politics and religion that captivated the Sunday afternoon memorial service for the slain conservative activist left little doubt that Kirk's death had elevated him to iconic status for the American right.