Incumbent Democratic Senator Barbara Mikulski ran for re-election against Republican Eric Wargotz and many third-party and independent candidates.
She won the Democratic primary with token opposition and defeated Republican Eric Wargotz 62%-38%.
Incumbent Democrat Dutch Ruppersberger ran for re-election against Republican Marcelo Cardarelli, a physician.
Incumbent Democrat Donna Edwards ran for re-election against Republican Robert Broadus and won in a landslide, 83%-16%.
Incumbent Democrat and House Majority Leader Steny Hoyer ran for re-election.
The composition of the district changed drastically, and he lost to John Delaney (Maryland politician).
Incumbent Democrat Chris Van Hollen ran for re-election, having represented the district since 2003.
[3] O'Malley and Brown became the first gubernatorial ticket in Maryland history to receive more than one million votes.
[4][5] Democratic incumbent Peter Franchot ran for re-election against Republican challenger William Henry Campbell.