President Donald Trump on Thursday directed his administration to crack down on backers of what it described as “left-wing terrorism,” naming two top Democratic donors as he alleged without evidence a vast conspiracy to finance violent protests against the government.

Trump’s executive order put the FBI’s Joint Terrorism Taskforce in the lead and said the effort would span agencies across the administration, including the Treasury Department, “to identify and disrupt financial networks that fund domestic terrorism and political violence.”

The pursuit of what the president said were the funders of "agitators and anarchists” is the latest instance of Donald Trump using the power of his office to persecute his political rivals. When pressed by a reporter to name any possible targets, he suggested two of the Democratic Party’s top donors — billionaires George Soros and Reid Hoffman.

“If they are funding these things, they're going to have some problems,” Trump said.