2016Flipped from DemocraticFinal resultsIncumbent defeated
2016 election for Iowa Senate District 8
Iowa State Senate · Iowa
Dan Dawson (R) won with 54.0% of the vote, defeating Michael E. Gronstal (D) by 8.1 points, a seat Democrats won last time.
Dan DawsonRepublican · winner
54.0%12,379
Michael E. GronstalDemocrat · incumbent
45.8%10,510
22,933 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET
The seat over time
D − R margin in this seat's races around 2016
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET