President Donald Trump has not been shy about trying to coerce close allies. This inclination has led to concerns that the president poses a unique threat to American alliances. Theoretically, these concerns are consistent with an influential line of argument pointing to strategic restraint and reassurancevia binding institutionsas what sets American alliances apart. However, the Trump presidency is not the first time that the shadow of exit has hung over the United States commitment to Europe. Indeed, a closer look at the North Atlantic Treaty Organizations (NATO) formative period shows that the United States actively considered leaving Europe throughout the 1950s. Even after resigning itself to staying in the early 1960s, the United States used threats of abandonment to put down the Franco-German revoltthe most significant challenge to its preponderant position in the NATO alliance. The primary implication is that American alliance relations have been characterized by more uncertaintyand less restraint and reassurancethan institutionalists have cared to emphasize, which paradoxically suggests that NATO, and the United States broader alliance network, is robust enough to survive President Trumps attempts at coercion.
