Jr. Bob Casey won with 58.6% of the vote (2,392,984 votes), ahead of Rick Santorum with 41.3% (1,684,778 votes).
The margin between the first two candidates was 17.4 percentage points (708,206 votes). The party margin (Republican share minus Democratic share) was a Democratic lead of 17.4 points.
Compared with the previous comparable race in the same area, the party margin moved 28.0 points toward Democrats. The winning party changed.
4,081,043 votes were counted in this race, for 2 candidates or options.
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