The former incumbent, Democrat Troy Carter, resigned after being elected to Congress in an April special election.
She joins what will be a crowded field hoping to succeed retiring Republican Sen. Roy Blunt
This move was widely expected and is now official. The Florida senate seat is one of 34 to be contested in 2022.
Virginia Democrats nominated Terry McAuliffe, while New Jersey Republicans chose Jack Ciattarelli. Democrats are favored in both states this November.
Democrats will choose a nominee to succeed termed-out Ralph Northam; both parties will nominate for seats in the House of Delegates