Chuck Grassley won with 69.6% of the vote (899,761 votes), ahead of Jean Lloyd-Jones with 27.2% (351,561 votes).
The margin between the first two candidates was 42.4 percentage points (548,200 votes). The party margin (Republican share minus Democratic share) was a Republican lead of 42.4 points.
Compared with the previous comparable race in the same area, the party margin moved 51.5 points toward Republicans. The winning party changed.
1,292,494 votes were counted in this race, for 10 candidates or options.
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