The Revenue Act of 1913, also known as the Underwood Tariff or the Underwood-Simmons Act, re-established a federal income tax in the United States and substantially lowered tariff rates. The act was sponsored by Representative Oscar Underwood, passed by the 63rd United States Congress, and signed into law by President Woodrow Wilson.

Robert Marion La Follette Sr., was an American lawyer and politician. He represented Wisconsin in both chambers of Congress and served as the governor of Wisconsin from 1901 to 1906. A Republican for most of his life, he ran for president of the United States as the nominee of his own Progressive Party in the 1924 presidential election. Historian John D. Buenker describes La Follette as "the most celebrated figure in Wisconsin history".