The White House said Thursday President Donald Trump fired the director of the CDC himself because she didn't "align with his mission."

During her briefing with reporters, White House press secretary Karoline Leavitt said Centers for Disease Control and Prevention director Susan Monarez was asked by the administration’s health secretary, Robert Kennedy Jr., to resign and she said she would but “then said she wouldn’t.”

“So the president fired her, which he has every right to do,” Leavitt said.

Leavitt said a statement released by Monarez’s lawyers “made it abundantly clear that she was not aligned with the president’s mission to Make America Healthy Again.”

She said a replacement for Monarez would be announced by Trump and Kennedy soon.

Leavitt said she didn’t have knowledge about more changes coming to the CDC, but noted that top officials left when Monarez did.

The press secretary also issued a warning to other government officials who don’t share Trump's vision, saying: “We will gladly show them the door.”

Asked if administration officials who push back against the president's agenda should fear losing their jobs, Leavitt responded: "If you're doing your job well, and if you are executing on the vision and the promises that the president made to the public who elected him back to this office, then you should have no fear about your job."

"Just do your job, that's what this president wants to see," she added.