2020Final results
2020 election for U.S. Senate in Kansas
U.S. Senate · Kansas
Roger Marshall (R) won with 53.2% of the vote, defeating Barbara Bollier (D) by 11.4 points.
Roger MarshallRepublican · winner
53.2%727,962
Barbara BollierDemocrat
41.8%571,530
Jason BuckleyLibertarian
5.0%68,263
1,368,211 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Barbara BollierRoger Marshall
$29M
Raised by the campaign
$6.8M
$28.8M
Spent by the campaign
$7.2M
$163K
Cash on hand
$210K
Campaign money: FEC, through Dec 31, 2020.
Source: FEC campaign filingsUpdated Dec 31, 2020