(CNN) President Donald Trump defended his embattled Environmental Protection Agency administrator, Scott Pruitt, in a tweet on Saturday, saying that Pruitt is "doing a great job!"

"While Security spending was somewhat more than his predecessor, Scott Pruitt has received death threats because of his bold actions at EPA," Trump tweeted. "Record clean Air & Water while saving USA Billions of Dollars. Rent was about market rate, travel expenses OK. Scott is doing a great job!"

While Security spending was somewhat more than his predecessor, Scott Pruitt has received death threats because of his bold actions at EPA. Record clean Air & Water while saving USA Billions of Dollars. Rent was about market rate, travel expenses OK. Scott is doing a great job! — Donald J. Trump (@realDonaldTrump) April 8, 2018

Pruitt is facing criticism and intense scrutiny for his management of the environmental agency, spending on his security detail and decision to rent a room in Washington, DC, tied to an energy lobbyist. He has become embroiled in a lengthy list of controversies as questions continue to mount over his actions as the head of the agency.