1978Final results
1978 election for Michigan Senate District 21
Michigan State Senate · Michigan
John A. Welborn (R) won with 69.0% of the vote, defeating Michael Slaughter (D) by 38.1 points.
John A. WelbornRepublican · winner · incumbent
69.0%52,510
Michael SlaughterDemocrat
31.0%23,560
76,077 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET