Donald Trump lashed out at the "radical left" on Wednesday after the apparent assassination of his right-wing ally Charlie Kirk, vowing a crackdown after a killing that has sparked fears of worsening political violence in the United States.
Tens of thousands of people gathered at the official memorial for slain US right-wing activist Charlie Kirk. PHOTO: AFP

The man arrested over the assassination of conservative influencer Charlie Kirk was romantically involved with a transgender roommate and held “leftist ideology,” Utah Governor Spencer Cox said, confirming details likely to fuel the national debate over the killing.

“Yes, I can confirm that,” Cox told CNN’s State of the Union regarding suspect Tyler Robinson’s reported relationship. “The roommate was a romantic partner, a male transitioning to a female. This partner has been incredibly cooperative, had no idea this was happening, and is working with investigators.”

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Cox, who said 22-year-old Robinson is expected to be formally charged Tuesday, stressed that it remains unclear whether the partner’s transitioning factored into the alleged motive. “Again, all of these things – we’re trying to figure out,” he said.

Speaking to NBC’s Meet the Press, Cox said investigators believe Robinson embraced leftist beliefs, based on information from family and friends. “There clearly was a leftist ideology with this – with this assassin,” he said.

A TV monitor displays a picture of Tyler Robinson, the suspected of killing Charlie Kirk on September 11, in Orem, Utah, on September 12, 2025. US President Donald Trump on Friday announced that the suspect had been taken into custody over the killing of right-wing activist Charlie Kirk after a massive manhunt. (Photo by Patrick T. Fallon / AFP)
A TV monitor displays a picture of Tyler Robinson, the suspected of killing Charlie Kirk on September 11, in Orem, Utah, on September 12, 2025. US President Donald Trump on Friday announced that the suspect had been taken into custody over the killing of right-wing activist Charlie Kirk after a massive manhunt. (Photo by Patrick T. Fallon / AFP)

Robinson’s reported relationship with a transgender individual sparked outrage among far-right activists, who have increasingly focused on gender identity issues. Conservative influencer Laura Loomer called for the Trans movement to be designated a “terrorist movement,” while X-owner Elon Musk shared posts criticizing leftist ideology and gender treatment policies.

Kirk, founder of the conservative youth group Turning Point USA, was shot Wednesday during a speaking event at a Utah university campus. He had frequently criticised the transgender rights movement and gender ideology, describing it in social media posts as a “trans delusion death cult.”

Debate over what motivated Kirk’s murder continues. Pete Buttigieg, a former Biden cabinet member, noted that political affiliation has not been a consistent factor in high-profile attacks and urged Americans to reject attempts to exploit political violence.

Turning Point USA announced that a memorial service for Kirk will be held on September 21 in a football stadium near Phoenix, Arizona, which former President Donald Trump confirmed he will attend.

ALSO READ: Trump blasts ‘radical left’ after killing of influencer Charlie Kirk

People gather at a makeshift memorial for right-wing activist and Turning Point USA Founder Charlie Kirk outside of the Turning Point USA headquarters in Phoenix, Arizona, on September 14, 2025. The widow of prominent right-wing activist Charlie Kirk pledged on September 12 to carry on her husband's work, after US authorities announced his alleged assassin had finally been captured. The 31-year-old Kirk was hit by a single bullet while addressing a large crowd at Utah Valley University in the town of Orem on September 10. (Photo by Charly Triballeau / AFP)
People gather at a makeshift memorial for right-wing activist and Turning Point USA Founder Charlie Kirk outside of the Turning Point USA headquarters in Phoenix, Arizona, on September 14, 2025. The widow of prominent right-wing activist Charlie Kirk pledged on September 12 to carry on her husband’s work, after US authorities announced his alleged assassin had finally been captured. The 31-year-old Kirk was hit by a single bullet while addressing a large crowd at Utah Valley University in the town of Orem on People gather at a makeshift memorial for right-wing activist and Turning Point USA Founder Charlie Kirk outside of the Turning Point USA headquarters in Phoenix, Arizona, on September 14, 2025. The widow of prominent right-wing activist Charlie Kirk pledged on September 12 to carry on her husband’s work, after US authorities announced his alleged assassin had finally been captured. The 31-year-old Kirk was hit by a single bullet while addressing a large crowd at Utah Valley University in the town of Orem on September 10. (Photo by Charly Triballeau / AFP) Credit: AFP

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