Are LA's Catholics the reason it is more willing to vote Dem then AL, MS, ect?

[Old Man Willow]

Is LA's decently sized Catholic population the reason it is (or was, during 1990s/2000s) more willing to vote Dem statewide than MS, AL, GA & SC? No doubt southern Catholics are very conservative on social issues, however they lack the political organizing of the religious right that Protestants have.