If Charlie Crist does not run for Senate, Marco Rubio is officially the luckiest man on Earth. Rep. Connie Mack IV (né Cornelius Harvey McGillicuddy IV), who pulled in decent numbers during early polling mainly because he shares a name with his father, former Sen. Connie Mack III, has decided not to run.
Instead, he'll run for re-election to his Southwest Florida House seat. Mack is married to Congresswoman Mary Bono (widow of Sonny Bono), who represents a district in California. This would be horrible logistically, what with him living in Florida and her living in California and whatnot, but they both spend most of their time living in Virginia. Before he decided to represent Southwest Florida in the U.S. House, he represented a portion of Fort Lauderdale in the state House. Geography means nothing to this man.
Now, if Crist doesn't run for Senate, this will leave Marco Rubio in contention along with some congressman from Sarasota -- Vern Buchanan -- whose biggest claim to fame is that he is not Katherine Harris.