2006Flipped from RepublicanFinal results

2006 election for U.S. Senate in Pennsylvania

Name: 2006 election for U.S. Senate in Pennsylvania
Start: 2006-11-07
Location: Pennsylvania

U.S. Senate · Pennsylvania

Robert P. Casey, Jr. (D) won with 58.6% of the vote, defeating Richard Santorum (R) by 17.4 points, a seat Republicans won last time.

58.6%2,392,984

41.3%1,684,778

4,081,043 votes

Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET

The seat over time

D − R margin in this seat's races around 2006

Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET

Each line compares the two campaigns on one scale.

Robert P. Casey, Jr.Richard Santorum

$17.9M

Raised by the campaign

$24.8M

$17.6M

Spent by the campaign

$25.8M

$336K

Cash on hand

$324.2K

Campaign money: FEC, through Dec 31, 2006.

Source: FEC campaign filingsUpdated Dec 31, 2006