1998Final results
1998 election for Iowa's 4th District
U.S. House · Iowa
Greg Ganske (R) won with 65.2% of the vote, defeating Jon Dvorak (D) by 31.3 points.
Greg GanskeRepublican · winner
65.2%129,942
Jon DvorakDemocrat
33.9%67,550
Steven YellinNatural Law
0.9%1,785
199,277 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 1998
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.
Jon DvorakGreg Ganske
$48.8K
Raised by the campaign
$1.5M
$45K
Spent by the campaign
$1.3M
$3.8K
Cash on hand
$187.2K
Campaign money: FEC, through Dec 31, 1998.
Source: FEC campaign filingsUpdated Dec 31, 1998