Paul O. Husting Democratic Irvine Lenroot Republican The 1918 United States Senate special election in Wisconsin was held on April 2, 1918.

Republican U.S. Representative Irvine Lenroot defeated Democratic Federal Trade Commission Chairman Joseph E. Davies and Socialist former Congressman Victor L. Berger.

[a] The election was also held during wartime, as the United States had formally entered into World War I on April 6, 1917, and major U.S. operations in Europe were set to begin in the summer of 1918.

Wisconsin, a state long defined by its progressive politics and home to a large ethnically German population, had been branded a "hotbed of sedition.

"[3] Joseph E. Davies ran at the personal request of President Woodrow Wilson, who hoped to win the seat and thus control of the Senate for his party.