1980Final results
1980 Democratic primary for Missouri Senate District 21
Missouri State Senate · Missouri
James Mathewson (D) won with 66.8% of the vote, defeating Bill Windsor (D) by 33.5 points.
James MathewsonDemocrat · winner
66.8%11,623
Bill WindsorDemocrat
33.2%5,786
17,409 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET