2018Final results
2018 election for Colorado's 3rd District
U.S. House · Colorado
Scott R. Tipton (R) won with 51.5% of the vote, defeating Diane Mitsch Bush (D) by 8.0 points.
Scott R. TiptonRepublican · winner
51.5%173,205
Diane Mitsch BushDemocrat
43.6%146,426
Mary M. MalarsieIndependent
3.2%10,831
Gaylon KentLibertarian
1.7%5,727
336,201 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.
Diane Mitsch BushScott R. Tipton
$1.9M
Raised by the campaign
$1.6M
$1.9M
Spent by the campaign
$1.7M
$4.4K
Cash on hand
$34.6K
Other candidates' campaigns: Mary M. Malarsie $111K.
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018
The candidates
Scott R. Tipton (R)Diane Mitsch Bush (D)
Also on the ballot: Mary M. Malarsie (Independent), 3.2%; Gaylon Kent (Libertarian), 1.7%