- Democratic congressional and state primaries: closed
- Republican congressional and state primaries: closed
- Democratic Presidential primary: closed
- Republican Presidential primary: closed
- Voters may or may not choose to affiliate with a political party, however, affiliation with a party is required to vote in primary elections.
- 25% of registered voters in Delaware are not registered with one of the two major political parties.
Details of voting in congressional and state primary elections:
- Voters must affiliate with a party to vote in primary elections.
- Party affiliation can be changed until the last Friday in May in the year of an election.