Donald Trump embraced his role as a radical nativist from the very beginning of his presidential campaign. Whether it was a conscious strategic decision or a product of his substantial populist instincts is almost beside the point. It was certainly counterintuitive, though, at least from the perspective of the Republican Party’s more centrist wing, which had determined, after Mitt Romney’s defeat in 2012, that the future of the GOP depended on courting the Latino vote through, among other things, a more moderate stance on immigration.