TALLAHASSEE, Fla. (AP) - Republican Congressman Connie Mack IV plans to run for the Senate seat once held by his father.
 
Campaign spokesman David James said Wednesday that Mack is beginning to make phone calls to assemble a team for a Senate run and will officially enter the race in the coming weeks.
 
In February, Mack announced he would not seek the seat and instead run for re-election.
 
Since then the candidate he endorsed, Senate President Mike Haridopolos, dropped out and no one has emerged as a clear favorite in the Republican field.
 
Also hoping to challenge Democratic Sen. Bill Nelson are former state Rep. Adam Hasner, retired Army Col. Mike McCalister, former steakhouse chain CEO Craig Miller and former Sen. George LeMieux, who served the last 16 months of Sen. Mel Martinez' term.