2008Final results
2008 election for Illinois's 10th District
U.S. House · Illinois
Mark Kirk (R) won with 52.6% of the vote, defeating Daniel J. Seals (D) by 5.1 points.
Mark KirkRepublican · winner
52.6%153,082
Daniel J. SealsDemocrat
47.4%138,176
291,258 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 2008
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Daniel J. SealsMark Kirk
$3.5M
Raised by the campaign
$5.5M
$3.6M
Spent by the campaign
$5.4M
$1.8K
Cash on hand
$79.9K
Campaign money: FEC, through Dec 31, 2008.
Source: FEC campaign filingsUpdated Dec 31, 2008