Senator John Kennedy said on Sunday that the administrator of the Environmental Protection Agency, Scott Pruitt, should "stop talking with his chin" and that Mr. Pruitt should eliminate the "stupid" "unforced errors" in between of recently reported ethical lapses.
"I would say that ethics, impropriety matters, the appearance of impropriety matters," said Mr. Kennedy, Republican of Louisiana, on CBS's "Face the Nation" program.
"As long as it is, stop acting like a chucklehead, stop the unforced error [s] stop guiding with the chin," he said.
"If you do not need to fly first class, do not do it, do not turn on the siren of your SUV just to see people move, you represent the president of the United States," Kennedy said, describing the recent behavior of the Mr. Pruitt as a "juvenile" distraction.
Mr. Pruitt is under fire amid recent reports on his travel and safety expenses and a Capitol Hill condo for $ 50 a night he has rented to the wife of an energy lobbyist.
Mr. Kennedy said Mr. Pruitt should hold a press conference to address the criticisms that he believes could be unfair.
The senator said that some, but not all, of the incoming fire could be politically motivated.
"In your position, why do you want to rent an apartment from a lobbyist for the love of God?" He said. "Stop guiding your chin, now these are unforced errors, they're stupid, there are a lot of problems that we can not solve, but you can behave."
President Trump expressed his support for Mr. Pruitt on Saturday, saying that he is doing a "great job", and that the rent was "above the market rate" and that the travel expenses were "OK".  "While Security spending was somewhat more than its predecessor, Scott Pruitt has received death threats because of his bold actions at the EPA," the president said on Twitter. "Register Clean Air & Water while saving billions of dollars."