Chuck Grassley won with 60.1% of the vote (926,007 votes), ahead of Patty Judge with 35.7% (549,460 votes).
The margin between the first two candidates was 24.4 percentage points (376,547 votes). The party margin (Republican share minus Democratic share) was a Republican lead of 24.4 points.
Compared with the previous comparable race in the same area, the party margin moved 16.1 points toward Republicans.
1,541,036 votes were counted in this race, for 5 candidates or options.
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