In a Sunday morning gaffe, White House acting Chief of Staff Mick Mulvaney likely fueled Democrats' impeachment case against President Donald Trump.

Mulvaney made the remarks on FOX News Sunday while being grilled by host Chris Wallace.

During a question about the White House's now-defunct decision to hold the G7 conference at Trump's Doral resort, Mulvaney revealed that President Donald Trump "still considers himself to be in the hospitality business."

"He was getting hammered by Republicans," Wallace explained. "So, why did he cave?"

"He was honestly surprised at the level of pushback," Mulvaney said. "At the end of the day, he still considers himself to be in the hospitality business."

Mulvaney's admission may complicate Trump's defense against court cases and potential articles of impeachment accusing him of violating the Emoluments Clause of the U.S. Constitution.