@JesseStone I've really not seen much evidence that Trump's endorsement carried much weight at all.
Landry has been a high profile Republican in a state that's pretty Republican-leaning these days, so while the win is larger than may be expected by a few points, it's not all that surprising, regardless of Trump.
I think it's a bad idea to overinflate the role Trump has among even Republicans, as his influence is even less among non-Republicans.