1918 United States Senate election in Massachusetts

1918 United States Senate election in Massachusetts

← 1913 November 5, 1918 1924 →

Nominee David I. Walsh John W. Weeks Thomas W. Lawson Party Democratic Republican Independent Popular vote 207,478 188,287 21,985 Percentage 49.66% 45.06% 5.26%

County results Walsh:      40–50%      50–60%      60–70% Weeks:      40–50%      50–60%      60–70%

Senator before election John W. Weeks Republican Elected Senator David I. Walsh Democratic

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The United States Senate election of 1918 in Massachusetts was held on November 5. Incumbent Republican Senator John W. Weeks ran for a second term in office but was defeated by Democratic former Governor David I. Walsh.

Primaries were held September 24. Both Walsh and Weeks were unopposed after their respective opponents, former Boston mayor John F. Fitzgerald and Governor Samuel W. McCall, withdrew from the race.

Walsh became the first U.S. Senator from Massachusetts elected to a full term as a member of the modern Democratic Party. (A previous Democratic U.S. Senator, Robert Rantoul Jr., served only one month in 1851 after winning a special election.) This was the only senate seat that Democrats flipped during this cycle. This was the first time that this seat was won by a non-Republican since 1855.