I can’t imagine that Mexican president Enrique Peña Nieto intended to give Donald Trump his best political moment since the GOP convention, but that’s what he did. That Peña Nieto reportedly said that Mexico won’t pay for the border wall in their private meeting and diplomatically dissented from Trump on other matters in public don’t compare to the priceless platform he gave Trump to look presidential on the international stage, and in Mexico no less. The trip carried risks for Trump–Peña Nieto easily could have embarrassed him–but it paid off.