Mulvaney walks back Trump's promise Mexico will pay for wall: 'You and I both know that it can't work exactly like that'

Incoming "acting" White House Chief of Staff Mick Mulvaney ducked around the question of whether President Donald Trump can get Mexico to pay for his border wall, saying the answer to that question isn't as simple as Trump makes it out to be.

Speaking with  Jonathan Karl on ABC's "This Week," Mulvaney smiled as he said Trump's wall must be paid for by the Treasury Department.

We're in a "good place" on getting wall built and having Mexico "participate" in border security," Mulvaney explained.

"But none of that is Mexico paying for the wall," Karl shot back.

“Technically, you and I both know that it cannot work exactly like that,” Mulvaney explained when asked about forcing Mexico to hand over a check for a wall they say they won't pay for.

Mulvaney continued, “The Department of Homeland Security can’t actually spend money from Mexico. We have to get it from the U.S. Treasury.”

Watch the video below via ABC: