Hours after Mexican President Enrique Peña Nieto said he’d warned Donald Trump that Mexico would not pay for any wall between the two countries, Trump doubled down and told a crowd in Phoenix that Mexico, not the U.S. would cover all costs of the wall. “Mexico will pay for the wall, 100 percent. They don’t know it yet, but they’re going to pay for it,” Trump said in a fiery immigration speech Wednesday night, adding that the wall would be “beautiful” and “impenetrable.” Oddly, Trump’s comments seemed to contradict not only the Mexican president, but also himself, as he’d admitted after the pair’s meeting that there had been no discussion on who would pay for the wall. Despite praising his meeting with Nieto as “substantive” and “constructive,” Trump took on a much harsher tone in his speech to supporters in Arizona. Promising “extreme vetting” of immigrants, Trump said he’d have no mercy on undocumented immigrants. “Day one, my first hour in office, those people are gone,” he said, promising to create a “deportation task force,” joking that “maybe they’ll be able to deport” Hillary Clinton.