The 1918 United States Senate election in Illinois took place on November 5, 1918.
Incumbent Democrat J. Hamilton Lewis lost reelection to Republican Medill McCormick.
The primaries and general election coincided with those for House and those for state elections. The primaries were held September 11, 1918.
This was the first election for this U.S. Senate seat to be held after the Seventeenth Amendment to the United States Constitution went into effect, and was therefore the first time that this seat faced a popular election.
Democratic primary Candidates James Hamilton Lewis, incumbent U.S. senator James O. Monroe, attorney and perennial candidate James Traynor
Results
Republican primary Candidates Alfred E. Case George Edmund Foss, U.S. congressman Medill McCormick, U.S. congressman Patrick H. O'Donnell William Hale Thompson, mayor of Chicago
Results
Socialist primary Candidates William Bross Lloyd, attorney and activist
Results
General election Candidates John M. Francis (Socialist Labor) J. Hamilton Lewis (Democrat), incumbent U.S. senator William Bross Lloyd (Socialist), attorney and activist Medill McCormick (Republican), U.S. congressman Frank B. Vennum (Prohibition Party), activist, capitalist, philanthropist, and 1912 candidate for Illinois treasurer
Results
See also 1918 United States Senate elections
References