Florida's popular governor could flip a U.S. Senate seat to the GOP, says the leader of a conservative organization.

The race between U.S. Sen. Bill Nelson and his Republican challenger, outgoing Governor Rick Scott, is expected to be the nation's most expensive Senate contest in the midterm elections.

The race analysis at RealClearPolitics shows polling firms have been busy in the Sunshine State, where six different firms have been gauging voter opinion since June and found mixed results. Scott is leading four polls, Nelson is leading two others, and neither candidate is enjoying a double-digit lead.

The RCP average shows Scott with a 1.5 percent edge over the incumbent.

David Caton, president of the Florida Family Association, tells OneNewsNow that Scott has the best chance of unseating Nelson of any candidate that has run against him.

"Senator Nelson has been invisible to the state of Florida on many issues. Senator Nelson has not been out campaigning," Caton says. "He's not really taken this election cycle as seriously as he should, given our governor Rick Scott's presence."

Caton insists that Scott has done a terrific job as governor by lowering state taxes, reducing regulations, and providing leadership to quickly assist storm-ravaged areas.

"That kind of service to the state of Florida, Caton predicts, "won't be forgotten."