Cumberland County Democrats have pulled party support for freeholder Jack Surrency and replaced him on the Democratic organization line with Millville commissioner Bruce Cooper.
Cooper will run with incumbents Carol Musso and George Castellini.
Democrats have a 6-1 majority and Republicans would need to take all three seats to take over control of the freeholder board.
The GOP has not yet announced their candidates.
Republicans had a surge in 2019 when Michael Testa, Jr. (R-Vineland), the Cumberland County GOP chairman, won a seat in the State Senate, along with two GOP assemblymen.
Last year, Republican Douglas Albrecht won the open freeholder seat of Joseph Sparacio, also a Republican who did not seek re-election. Democratic incumbent Darlene Barber won the other seat by a margin of just 446 votes over Republican Jeffrey Bordley.
Cumberland just narrowly went Democratic in 2016, with Barber winning re-election by just 591 votes. Rep. Frank LoBiondo (R-Ventnor) won Cumberland by 7,355 votes (56%-40%) and Hillary Clinton outpolled Donald Trump by 3,318 votes, (51%-45%).
Musso was the mayor of Deerfield before her election to the Board of Freeholders in 2011, and was the top vote-getter in 2017, leading Republican Carman Daddario by 3,050 votes.
Castellini, the son of a former Cumberland County sheriff, was elected in 2017. He finished second in a field of seven candidates, 417 votes behind Musso.
Democrats also awarded their line to Cory Booker for U.S. Senate and Brigid Callahan Harrison for Congress.
This story was updated at 9:16 AM.