1968Final resultsIncumbent defeated
1968 election for Delaware Senate District 1
Delaware State Senate · Delaware
Michael N. Castle (R) won with 54.0% of the vote, defeating Russell D. F. Dineen (D) by 8.1 points.
Michael N. CastleRepublican · winner
54.0%6,544
Russell D. F. DineenDemocrat · incumbent
46.0%5,568
12,112 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 1968
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET