Calvin Coolidge writing to his father about the 1915 general election: October 29, 1915.

Coolidge also writes about the campaign in his Autobiography, “In the campaign for election I toured the state with Mr. McCall, making open-air speeches from automobiles during the day, and finishing with an indoor rally in the evening. It was the hardest kind of work but most fascinating.” During the campaign, Ohio Senator Warren G. Harding came to stump for the McCall/Coolidge ticket in Lowell, Massachusetts.

Coolidge saw his role in the campaign as that of a fervent supporter of McCall. He says in his Autobiography, “I did not refer to my own candidacy, but spent all my time advocating the election of Mr. McCall. He was a character that fitted into the situation most admirably. He was liberal without being visionary and conservative without being reactionary.” In the end, McCall and Coolidge won a state-wide victory for the GOP for the first time since 1909. Republicans also gained control of both houses of the legislature. Interestingly, while McCall won by 6,000 votes, Coolidge achieved a much greater margin of victory, winning by more than 52,000 votes.