Conservative congressman and Trump ally Rep. Steve King (R-IA) urged the President on Sunday to “purge Leftists” from his administration before they “sink us.”

On his Twitter account, King made the recommendation while posting a story from Conservative Review’s Daniel Horowitz.

@RealDonaldTrump needs to purge Leftists from executive branch before disloyal, illegal & treasonist acts sink us. https://t.co/o1DYtgA7aL — Steve King (@SteveKingIA) March 6, 2017

In his article, Horowitz wrote that there had been “a silent coup within the intelligence agencies” against Trump, and he argued for a wholesale firing of political appointees who don’t “share the views of the president.”

“Any open borders official within DOJ and DHS should be gone,” he wrote. “Any pro-government-run health care supporter within HHS has to go. Any official within Treasury who is not on board with the OMB spending cuts and pro-growth tax cuts should go out and campaign for their cause … on the outside. Any State Department official who is a shill for refugee resettlement, a Palestinian State, the Muslim Brotherhood, or who opposes the president’s immigration moratorium must go.”