Mexican President Enrique Peña Nieto has canceled a trip to the United States after President Donald Trump told him to if Mexico refuses to pay for the border wall.

Translation: This morning we have informed the White House that I will not attend the meeting scheduled for next Tuesday with the @POTUS.

On Wednesday, Trump signed an executive order for the Department of Homeland Security to immediately start construction on a border wall. He told the press that Mexico will ultimately pay back us taxpayers for this wall.

Nieto responded that Mexico will not pay for a wall since the country “does not believe in walls.”

Trump retorted back to Nieto on Twitter:

Press Secretary Sean Spicer a future meeting may occur:

“We’ll look for a date to schedule something in the future,” Spicer told reporters as he exited Air Force One in Philadelphia, where Trump was attending a GOP retreat. “We will keep the lines of communication open.”