Bob Vander Plaats, an evangelical activist in Iowa, is urging President Trump to fire Anthony Scaramucci, the new White House communications director, for unleashing an expletive-filled tirade against Trump administration officials.

"Mr. President, it is time to look in the mirror, accept responsibility, apologize to the American people, and declare an end to this behavior immediately," Vander Plaats wrote Friday on the website of the Family Leader, a social conservative organization he runs.

"I suggest you lead by first washing out Mr. Scaramucci's mouth with a bar of soap. After a thorough rinsing, strip his credentials and escort him personally off the White House grounds."

On Thursday, New Yorker reporter Ryan Lizza published a first-person account of a conversation he had with Scaramucci on Wednesday night, in which he referred to Reince Priebus, White House chief of staff, as a "fucking paranoid schizophrenic."

Trump on Friday replaced Priebus as chief of staff with John Kelly, who was secretary of the Department of Homeland Security.

Trump and Vander Plaats engaged in high-profile spats during the GOP primary. Vander Plaats is a former national co-chair of Ted Cruz's presidential campaign.

In January of last year, Trump tweeted that Vander Plaats is a "total phony," a "dishonest guy," and a "con man." Vander Plaats responded by saying "love you," and calling Trump a "friend" who he would not endorse.

Vander Plaats said in his online post that he's disappointed with Trump's leadership so far in the White House.

"To say the conduct we have been witnessing recently is unacceptable and not representative of the 'spirit' of America is a gross understatement," he said. "The current occupants are found wanting with their leaks, double talk, defense of the indefensible, vulgarity, and their lack of overall respect for each other and, most importantly, their embrace of the people's sacred trust. Yes, the world is watching. And, more importantly, our children are watching."