He engaged in agricultural pursuits and worked for many farm and labor organizations. He was a charter member and organizer of the Minnesota Farmer-Labor Party. In 1924 he assisted in organizing the Federated Farmer-Labor Party at Chicago in 1924.
Shoemaker was nominated for Vice President of the United States, but declined to run.
He served as editor and publisher of the People's Voice in Green Bay, Wisconsin, from 1921 to 1927, and of the Organized Farmer in Red Wing, Minnesota in 1928. Shoemaker was elected as a Farmer-Laborite to the 73rd congress (March 4, 1933 – January 3, 1935).
He was not a candidate for renomination in 1934 to the 74th congress, but was an unsuccessful candidate for nomination for United States Senator. He then became an unsuccessful Independent candidate for reelection to the 74th congress.
After an unsuccessful election campaign in 1942 to the 78th congress, he resumed agricultural pursuits near North Redwood, Minnesota.
He died at University of Minnesota Hospitals in Minneapolis on July 24, 1958, and was buried in Zion Cemetery in Flora Township, Renville County, Minnesota.
Member 73d Congress (1933-1935), Minnesota at large. Farm-Laborite.
Married Lydgia H. Schneider, April. 1 child, Frederic Warren.