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Former Gov. Jeb Bush says Connie Mack IV is his choice in Florida's Republican primary race for the U.S. Senate.
Bush called the Fort Myers congressman a "principled conservative" in a statement released Wednesday.
Mack has steadily been pulling in endorsements from prominent Republicans including presumptive GOP presidential nominee Mitt Romney.
Bush, though, remains one of most popular personalities among Republicans in Florida and the nation.
Mack, whose father also served in the U.S. Senate, is one of several candidates running in the Aug. 14 Republican primary for the right to challenge Democratic U.S. Sen. Bill Nelson.
The other GOP candidates include former U.S. Rep. Dave Weldon, former U.S. Sen. George LeMieux and retired Army Col. Mike McCalister.
Mack said in a statement that he was humbled by Bush's endorsement.