Stephanopoulos noted that when Trump was asked by a reporter Friday at the G-20 summit in Germany if he still wants Mexico to pay for a border wall, the president responded "absolutely," but there was nothing in a readout of the meeting between him and Mexican President Enrique Peña Nieto suggesting they had discussed that issue.
"Mexico is not going to pay for [the wall], are they?" Stephanopoulos asked on "This Week."
"I didn't say that," Mnuchin said. "The president has said that he expects that it will be paid for. And we'll deal with that at the right time."
Mnuchin said the administration has made "enormous progress" with Mexico in combating illegal immigration and is "looking forward to renegotiating NAFTA," which he said is "a significant accomplishment."
Stephanopoulos pressed, "Isn't it time to concede that Mexico is not going to pay for that wall and you're not going to be able to renegotiate NAFTA if you insist on Mexico paying for the wall?"
"What I would say is that's not the focus for the moment," the treasury secretary responded.
Then in October, the month before the election, Trump suggested Mexico could reimburse U.S. taxpayers for the project.
"Ultimately, it will come out of what's happening with Mexico ... and we will be in a form reimbursed by Mexico, which I've always said," Trump said.