Diagnosing the problem as fascist leads to the question of a solution. What becomes the utility of knowing Trump is fascist? For the historian of the 1930s, the answer seems clear: either the forces that could coalesce against it remain divided, vowing to eternal enmity, as happened in Germany on the eve of Hitler’s ascent to power; or they create a united front, however unwieldy, as happened with the Popular Front in France a few years later. In the former case, the left accused the center of being scarcely better than the right. In the latter case, a coalition of center and left, long at odds with each other over questions of ideology and strategy, looked at results in Germany as a salutary lesson to be avoided. They bridged their considerable differences and succeeded in staving off a domestic French fascism. Should the right in this country fail to coalesce around Trump, and he runs as an independent, then a victory for the Democratic candidate – even should that candidate be Bernie Sanders – becomes very likely. But should Trump win the GOP presidential nomination and rally the party around him, it will be incumbent upon those on the left, however “centrist” or “socialist,” to put aside their differences and once more defeat the forces of fascism.