2018Final results
2018 election for U.S. Senate in Maryland
U.S. Senate · Maryland
Benjamin L. Cardin (D) won with 64.9% of the vote, defeating Tony Campbell (R) by 34.5 points.
Benjamin L. CardinDemocrat · winner
64.9%1,491,614
Tony CampbellRepublican
30.3%697,017
Neal SimonIndependent
3.7%85,964
Arvin VohraLibertarian
1.0%22,943
2,299,889 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.
Benjamin L. CardinTony Campbell
$4.1M
Raised by the campaign
$197.6K
$3.5M
Spent by the campaign
$203.9K
$1.3M
Cash on hand
$1.6K
Other candidates' campaigns: Neal Simon $2.1M.
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018
The candidates
Benjamin L. Cardin (D)Tony Campbell (R)
Also on the ballot: Neal Simon (Independent), 3.7%; Arvin Vohra (Libertarian), 1.0%