Three-term Democratic Senate President pro tempore James Paul Clarke died October 1, 1916.

Democrat William F. Kirby was elected November 7, 1916 to finish the term.
 He served  only the rest of this term, losing renomination in 1920.
Three-term Democratic Senate President pro tempore James Paul Clarke died October 1, 1916.
Democrat William F. Kirby was elected November 7, 1916 to finish the term.  He served  only the rest of this term, losing renomination in 1920.
1916 United States Senate elections