As a presidential candidate, Donald Trump broke not only from the Republican Party but also from the bipartisan consensus on U.S. foreign policy. Calling the Iraq War a terrible mistake and lamenting America’s nation-building expeditions, Trump evinced little interest in maintaining the traditional form of American leadership of the liberal international order. Instead, Trump’s “America First” vision called for a reassertion of American nationalism on the economic front as well as in foreign affairs. Since Trump took office, it has become clear that “America First” was more of a campaign slogan than a coherent vision of American grand strategy. As president, Trump has steered a course that has maintained some of the worst aspects of previous foreign policy—namely, the pursuit of primacy and frequent military intervention— while managing to make a new set of mistakes all his own.