Utah governor Spencer Cox says suspect Tyler Robinson not cooperating with authorities. Key Trump administration stories from Sunday 14 September

As officials continue to investigate the motives of Tyler Robinson – the 22-year-old accused of shooting conservative activist Charlie Kirk – many Republicans have been quick to lash out at the political left.

Allies of Donald Trump have accused liberals of fomenting anti-conservative vitriol that would encourage violence – even as the president and his allies have often invoked violent imagery against their opponents.

“The problem is on the left,” Trump told reporters on Sunday. “A lot of people that you would traditionally say are on the left … [are] already under investigation.”

It comes after Trump declined to call for the US to come together as a way of fixing the country’s divisions, preferring to cast “vicious and horrible” radicals on the left of US politics as the sole problem.