Incoming White House acting chief of staff Mick Mulvaney on Sunday dismissed speculation that President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's presidency is in "crisis."

“I don’t think there’s concern that the presidency is in crisis," Mulvaney said on "Fox News Sunday." "This is what having a president who is nontraditional looks like. He’s not going to be an ordinary president. That’s not what people wanted when they elected him."

Mulvaney's comments came after he was pressed by Fox News host Chris Wallace, who noted the partial government shutdown, Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE's resignation, steep drops in the stock market and fractures between Trump and congressional Republicans.

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A number of Republicans in Congress, including typical Trump allies such as Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.), harshly criticized Trump last week over his decision to withdraw U.S. troops from Syria.

That decision also prompted the resignation of Mattis, who wrote in his resignation letter that Trump deserves a Defense secretary "whose views are better aligned with yours."

But Mulvaney on Sunday defended Trump's move to withdraw those troops, saying it wasn't a "snap decision" and noting that Trump has said for years that he wanted to remove U.S. forces from Syria.

"This is not something that was done at the drop of a hat. The president has been working on this for two years. So it’s unfortunate that it came out the way that it did, but this was not a snap decision. And it’s not a surprise to anybody, because it’s exactly what the president said he was going to do," Mulvaney said.

Ohio Gov. John Kasich (R) said later on the program, however, that "great chaos" would be created if a significant number of his aides left.

“We’d have a great difficulty getting things done. And it would communicate chaos throughout the state, the legislature, whatever,” Kasich, who has said he’s considering a challenge to Trump in 2020, added. “So it’s very disturbing.

“The implications of what all this means long term for our foreign policy, for our domestic agenda is up in the air. It concerns me a great deal."

— This report was updated at 10:26 a.m.