The election of Donald J. Trump to the office of president opens a number of opportunities for the Left. However, the outcome of the election resists satisfactory explanation, so recognizing and seizing these opportunities will be difficult. Diverse news sources pose numerous different rationales for choosing Trump over Hillary Clinton: dissatisfaction with urban elite liberalism, with Clinton, with current economic conditions, and with shifts in the racial makeup of the country. None of these factors, products of a widening division in political rhetoric engendering widely different ideological inferences, appear particularly opportune for the Left. Understanding this division allows the Left to seize the opportunities presented by this divisive election while, insofar as it is possible, undertaking damage control for the consequences of a unified Republican government.