2024Flipped from DemocraticFinal results
2024 election for U.S. Senate in Pennsylvania
U.S. Senate · Pennsylvania
David McCormick (R) won with 48.8% of the vote, defeating Robert P. Casey, Jr. (D) by 0.2 points, a seat Democrats won last time.
David McCormickRepublican · winner
48.8%3,399,054
Robert P. Casey, Jr.Democrat
48.6%3,382,144
John C. ThomasLibertarian
1.3%89,646
Leila HazouGreen
1.0%66,311
Marty SelkerConstitution
0.3%23,620
6,960,775 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 3:26 AM ET
The seat over time
D − R margin in this seat's races around 2024
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 3:26 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Robert P. Casey, Jr.David McCormick
$58.1M
Raised by the campaign
$36M
$60.2M
Spent by the campaign
$35.4M
$995K
Cash on hand
$605.5K
Other candidates' campaigns: Marty Selker $16.3K · John C. Thomas $4.9K.
Campaign money: FEC, through Dec 31, 2024.
Source: FEC campaign filingsUpdated Dec 31, 2024
The candidates
David McCormick (R)Robert P. Casey, Jr. (D)
Also on the ballot: John C. Thomas (Libertarian), 1.3%; Leila Hazou (Green), 1.0%; Marty Selker (Constitution), 0.3%