Ron Johnson won with 50.2% of the vote (1,479,471 votes), ahead of Russ Feingold with 46.8% (1,380,335 votes).
The margin between the first two candidates was 3.4 percentage points (99,136 votes). The party margin (Republican share minus Democratic share) was a Republican lead of 3.4 points.
Compared with the previous comparable race in the same area, the party margin moved 8.9 points toward Republicans. The winning party changed.
2,948,741 votes were counted in this race, for 3 candidates or options.
More races: all races, candidates and analysis.