It is also interesting to point out Cameron Parish in the southwest corner of the state which I guess is more Catholic but has swung Republican much harder more recently while LaSalle Parish flipped in the 1950s.
Cameron is rapidly depopulating--it's extremely vulnerable to climate change and has been heavily damaged by most recent hurricanes. I wouldn't be surprised if there were electoral effects from this.
Plaquemines Parish in the southeast, one of the "toes of the boot", was similarly hyper-Republican to LaSalle nowadays (or supported States' Rights slates and third-party candidates similarly furiously) from 1948 to 1972 thanks to the influence of political boss Leander Perez, giving Eisenhower a staggering 93% in 1952, although it approached the mean as its Black population became enfranchised (strangely, it swung significantly Democratic from 1976 to 1980, perhaps due to enfranchisement), and ended up voting for Clinton by about eight points in 1996 amidst his very strong statewide performance. It strongly hemorrhaged population after Katrina, but seems to have grown slightly since then due to its strong seafood, citrus, and oil industries, although one imagines that things are also becoming quite dicey there ecologically, which will probably make the parish a deep red rump like it once was.
