With the United States being in the middle of the greatest war yet in its history, millions of men were off at the front; the polling for the soldiers would take place in the rear-areas. As a result, Roosevelt's supporters went through the trenches and military zones and stumped for their man there. Debs' supporters, on the other hand, mobilized support from the working class in the big cities of the USA.
There was one main issue both parties stumped about: prosecution of the Great War. The Democrats declared that it was folly to "change horses in midstream," and that the war against the CSA and British Empire must be waged until victory was won, at whatever the cost. The Socialists campaigned for a fair peace, in which no lands or reparations would be given, and used the Democrats' "whatever the cost" slogan against them; in New YorkFlora Hamburger voiced disgust with Lt. General George A. Custer's second Nashville offensive while running for Congress, and how Custer's offensive took a lot of casualties while moving away from the capital of Tennessee. The Socialists also campaigned for a better deal for the workers of the USA, and pointed out how Roosevelt's "Fair Deal" was failing to live up to its promises.
Theodore Roosevelt defeated Eugene V. Debs' last bid for the presidency in November 1916. While many Socialists and leftists in the USA groaned at Roosevelt having four more years to carry out Democratic policies, many more Americans were glad that they had four more years to defeat the CSA, which was already straining from two years of total war as well as the ongoing Red Rebellion. Not long after Roosevelt's second (and secret) inauguration on March 4, 1917, General Custer launched his Barrel Roll Offensive, leading to the collapse of the Confederacy on the Tennessee front and its subsequent request for an armistice in August.
The Progressive Party renominated former president Theodore Roosevelt and nominated John Parker of Louisiana as his running-mate. However, Roosevelt refused to accept their nomination and threw his support behind Hughes. This led to the Progressives' dissolution and most of the party's supporters returned to the Republican Party.