AL will not vote Democratic in any statewide race. Whites have gone from 70-75% Republican to 85-90% Republican since Obama.
Louisiana is not too different from Alabama demograhpically and they voted for a Democrat for Governor while Obama was still in office. A little different circumstances, sure, but there's a non-zero chance of a Democrat winning the gubernatorial race there with all that's transpired down there. You wouldn't see so many Democrats eager to run if they didn't see polling indicating otherwise
A decent % of LA whites are Catholic, very different from the evangelical protestants of the other deep southern states. They are not as devoutly GOP.
They were substantially more liberal then "typical Deep South whites" until, approximately, 2008. But moved sharply to the right since then in most elections. Recent example - Democrats couldn't even find a candidate in special state legislative election in Acadiana, and seat (formerly - Democratic) went Republican by default. It's in this region, where Democrats will lose number of state legislative seats in 2019, when term limits will force incumbents to retire.