Some Sussex County Democratic leaders want to make it clear that Newark Mayor Cory Booker does not have their endorsement yet, despite his slogan on the primary ballot.

Cory Booker campaigns for U.S. Senate in Long Branch with Bill Bradley on Independence Day (Facebook)

Booker's campaign has chosen "Sussex County Democrats 2013" as his slogan for the Aug. 13 U.S. Senate primary in the county.

But county Democratic committee chairman Michael Busche tells The Star-Ledger ( he does not have the county endorsement.

Busche says the party leadership plans to pick its favorite after a straw poll later this month.

Booker joins three other Democrats and two Republicans in the race to fill the last 15 months of late Sen. Frank Lautenberg's term.

(Copyright 2013 The Associated Press. All Rights Reserved)