I don’t know, for some reason, I’d be surprised if he did. If anything, he may run for President in 2016, and the Senate race would be a distraction, since he’d have to start campaigning for President almost immediately upon taking office (and the Dems could use it against him that he wouldn’t be a “full-time” Senator). Even Zero couldn’t have jumped from one to the other that fast.
Hate to say it, but he just looks too dorky to run for President. I think he’s the best bet to knock off Landrieu anyway.
Whatever it is he does, I would be willing to bet on one thing for certain: the Dems will get Kal Penn to do an impersonation of him, probably an OFA web ad like the one they did with the dykey slut. And, it’ll be vicious as hell, even allude (if not state outright) that Jindal is a sell-out.