Trump reacts as son Donald Trump Jr. does bizarre impression of him at Charlie Kirk memorial

Donald Trump has reacted after his oldest son, Donald Trump Jr, did a rather bizarre impression of him during Charlie Kirk's memorial.

Thousands have gathered in Arizona to pay their respects to Kirk, who was assassinated on September 10 while he attended an event at Utah Valley University.

The 31-year-old controversial activist was fatally shot in the neck, and two days after his passing, authorities announced they had apprehended Tyler Robinson, 22, after a family member had reportedly turned him in.

Robinson has since been charged with seven counts, including aggravated murder, and prosecutors said they are planning to pursue the death penalty if he is convicted.

A few people close to Kirk have spoken at his memorial service, as well as members of the White House, including Chief of Staff Stephen Miller.

And one rather bizarre moment saw Trump Jr. impersonate his father.

"You know, Don, you're getting a little aggressive on social media. Don, relax!" Trump Jr. said to the crowd in the President's distinctive voice.

The camera then panned to the POTUS, who could be seen laughing before giving his son a thumbs-up for the joke.

It comes after the President recalled the last time he spoke to Kirk.

"So the last time I spoke to him, he said 'Sir,' then he goes 'Phoenix,'" Trump said on Tuesday (September 16). "'Sir could you, er, get to Phoenix,' this was like in a day. I said, 'Charlie, I'm the President of the United States, you've called me, asking me if I could speak tomorrow in Phoenix? You can't do that to me, Charlie.'

"But I usually ended up going," Trump recalled with a laugh. "He was great. He was a great guy and he didn't deserve this. He didn't deserve this, believe me."

Kirk's memorial has taken place at State Farm Stadium in Glendale, Arizona, which can hold up to 63,000 people.

As well as members of the public, President Trump and Vice President JD Vance travelled over 2,000 miles from Washington, D.C to attend the service.

US Secretary of State Marco Rubio, White House Chief of Staff Susie Wiles, and US Defence Secretary Pete Hegseth have also been in Arizona.

Strict protocols and guidelines were also in place for those in attendance, including the dress code, and bags were not allowed to be brought inside the stadium.

On Friday, an armed man was also arrested at the stadium site after conducting a 'security sweep'.