George LeMieux is frequently mentioned as a potential challenger to Bill Nelson in 2012, but I have a hard time seeing him as one of the GOP's more viable candidates.
When we polled Florida last month we found LeMieux with only a 13% approval rating and 33% of voters disapproving of him. He had negative numbers across party lines with a plurality of Democrats, Republicans, and independents all expressing negative feelings toward him. The figures didn't even bode particularly well for his ability to win a contested GOP nomination contest- 29% of Republicans gave him poor marks with only 15% expressing positive feelings toward him.
Even Quinnipiac- which tends to give politicians of both parties higher approval ratings than we do- found LeMieux in negative territory on its most recent Florida poll. They at least found a plurality of Republicans speaking positively of him, but the numbers were far from impressive with 26% expressing approval to 16% disapproving.
I don't think voters are going to like politicians a whole lot more in 2012 than they do right now, so Republicans are going to have a much better chance against Nelson if they can run someone with outsider cred. A former Senator's about as far away from that as you can get. It's hard to imagine LeMieux's run in Washington extending much further than the end of the year.