"Heavy Central American accents?" An agent that didn't speak English? Is the regime employing some of Bukele's goons? The very gangsters that we claim to be trying to expel?
That's Eric Greitens level for getting your local Rs to turn on you. He's a culture war grifter with fake operator vibes like any number of goofs that have risen thanks to Wellington's Law of Command.
Fascism is a notoriously hard concept to pin down. Took a graduate class on it under Mac Knox a lifetime ago and, at the end, we still didn't have much of a working definition beyond you know it when you see it under certain conditions. And I'd say those conditions have been met to a basic extent.
Ok, so if it is unfederalized Guard that's a violation of state sovereignty, and if they're federalized it's a Posse Comitatus violation. Which one's it gonna be?
Who knows? Collapsing empires can be pretty destructive to all and sundry. Honestly, I'd expect a coup before that - there are more invested in the existence of the larger state than in a collection of small, potentially feuding, states. Or not. I hate things.
In the end, if you do it the "right way" it goes to the courts while the smash and grab regime just does it. In the end does this mean refusal of orders and a further breakdown of constitutional order and the Union? What if some Guard obeys and some doesn't? Fraught times.