Mexico? Indeed. About the 1916 election:

The Democrats built their campaign around the slogan, "He Kept Us Out of War," saying a Republican victory would mean war with both Mexico and Germany. Wilson's position was probably critical in winning the Western states.  Charles Evans Hughes insisted on downplaying the war issue. He advocated a program of greater mobilization and preparedness. With Wilson having successfully pressured the Germans to suspend unrestricted submarine warfare, it was difficult for Hughes to attack Wilson's peace platform. Instead, Hughes criticized Wilson's military interventions in Mexico, where the U.S. was supporting various factions in the Mexican civil war.