Joni Ernst won with 52.1% of the vote (588,575 votes), ahead of Bruce Braley with 43.8% (494,370 votes).
The margin between the first two candidates was 8.3 percentage points (94,205 votes). The party margin (Republican share minus Democratic share) was a Republican lead of 8.3 points.
Compared with the previous comparable race in the same area, the party margin moved 22.7 points toward Democrats.
1,129,700 votes were counted in this race, for 6 candidates or options.
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