Jindal has the second worst approval ratings of any governor in the country. I don't think that would go away by 2016. I am sure that Jindal isn't the only conservative in Louisiana and they could do much better for senator.
Jindal isn’t, nor has he ever been a “conservative.” He did have some conservative traits - pro-life, pro second amendment - but mostly he was a typical RINO for the eight years in office.
Two congressmen, John Fleming and Charles Boustany, both MD’s, will run for Vitter’s seat; either could see their House seat go Democrat too in 2016. The third-placed candidate in 2014, Rob Maness, with the Tea Party, is also expected to run. Scott Angelle is thought to be interested. I wouldn’t be surprised to see HRC coax Mary Landrieu to try for a comeback either.