United States President Donald Trump is vowing a crackdown on political violence in the wake of the assassination of his close ally, the powerful right-wing influencer Charlie Kirk.

The President is blaming what he calls the "radical left" for the murder.

Charlie Kirk was shot as he addressed a crowd of students near Salt Lake City in Utah, as part of a speaking tour on university campuses.

USSC Director of Research Jared Mondschein spoke with ABC's PM on this development.