2008Flipped from RepublicanFinal results
2008 election for Michigan's 9th District
U.S. House · Michigan
Gary C. Peters (D) won with 52.1% of the vote, defeating Joseph Knollenberg (R) by 9.5 points, a seat Republicans won last time.
Gary C. PetersDemocrat · winner
52.1%183,311
Joseph KnollenbergRepublican
42.6%150,035
Jack KevorkianIndependent
2.6%8,987
Adam GoodmanLibertarian
1.4%4,893
Douglas CampbellGreen
1.3%4,737
351,963 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.
Gary C. PetersJoseph Knollenberg
$2.6M
Raised by the campaign
$3.8M
$2.5M
Spent by the campaign
$4.1M
$44.5K
Cash on hand
$112.7K
Other candidates' campaigns: Jack Kevorkian $7.6K.
Campaign money: FEC, through Dec 31, 2008.
Source: FEC campaign filingsUpdated Dec 31, 2008
The candidates
Gary C. Peters (D)Joseph Knollenberg (R)
Also on the ballot: Jack Kevorkian (Independent), 2.6%; Adam Goodman (Libertarian), 1.4%; Douglas Campbell (Green), 1.3%