Delaware Republicans needed to have a net gain of one seat to flip the chamber from the Democrats, however, Democrats increased their majority in the Senate by gaining one seat (winning 12 seats, compared to nine seats for the Republicans).[2]
Incumbent Democratic Majority LeaderMargaret Rose Henry had represented the 2nd district since 1994. Henry retired, and fellow DemocratDarius Brown won the open seat.
Delaware Senate 2nd district Democratic primary election, 2018
Incumbent DemocratRobert Marshall had represented the 3rd district since 1979. Marshall retired, and fellow DemocratElizabeth Lockman won the open seat.
Delaware Senate 3rd district Democratic primary election, 2018
Incumbent DemocratBrian Bushweller had represented the 17th district since 2009. Bushweller retired, and fellow DemocratCharles Paradee won the open seat.
Delaware Senate 17th district Republican primary election, 2018
Incumbent Republican Minority LeaderGary Simpson had represented the 18th district since 1999. Simpson retired, and fellow RepublicanDavid Wilson won the open seat.
Delaware Senate 18th district general election, 2018
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