2018Final results
2018 election for Kansas's 4th District
U.S. House · Kansas
Ron Estes (R) won with 59.3% of the vote, defeating James A. Thompson (D) by 18.7 points.
Ron EstesRepublican · winner
59.3%143,459
James A. ThompsonDemocrat
40.6%98,304
241,969 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
Money in this race
Each line compares the two campaigns on one scale.
James A. ThompsonNo Republican
$1.5M
Raised by the campaign
—
$1.5M
Spent by the campaign
—
$0
Cash on hand
—
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018