In Louisiana, statewide elections are not necessarily determined by who is R or D but rather who is C.
R=Republican
D=Democrat
C=Cajun
In the River Parishes and Acadia, lots of conservative people vote C.
Edwards, Bel Edwards, Blanco, Foster, Landrieu.
The only exception may be Jindal, but he had a lock in the north and Jefferson Parish.
You must not be from Louisiana. The most conservative parishes are in the north.
The democrats are in the metropolitan areas plus the northeast along the Mississippi River.