2018Final results
2018 election for Maryland's 1st District
U.S. House · Maryland
Andy Harris (R) won with 60.0% of the vote, defeating Jesse Colvin (D) by 21.9 points.
Andy HarrisRepublican · winner
60.0%183,662
Jesse ColvinDemocrat
38.1%116,631
Jenica MartinLibertarian
1.9%5,744
306,186 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.
Jesse ColvinAndy Harris
$1.9M
Raised by the campaign
$1.7M
$1.8M
Spent by the campaign
$1.9M
$69.1K
Cash on hand
$549K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018