I don't see it happening. Fascism is by definition a corporatist structuring of society, and with Long attacking corporations and corporate greed in the Senate and in Louisiana, I doubt he could have supported such a societal structure. That, and Long, in my opinion, didn't have overtly fascist tendencies, he was just corrupt, which doesn't always equal fascist, at any rate. Besides, he was quite the quasi-socialist as it was. Share Our Wealth would never have flown in Nazi Germany or Fascist Italy.
Well, the obvious problem here is that Coughlin was born in Canada, though with a fascist revolution of some sorts, I still don't really see it. Coughlin would be an excellent propaganda minister, though.
Don't know enough about the guy, but from the Wiki article, he looks almost like a genuinely American version of Hitler. A distinct possibility, I guess.
I don't see this one happening, simply because I don't think that a clone Nazi movement would work. If you're going to have fascism in the United States, it has to have a genuinely American flair to it.
He'd need to at least appear as not a Nazi, especially after WWII. Let's say Rockwell joins either major party, becomes something like Governor or Senator from Virginia, then makes a Presidential bid, in oh, say, 1968. If he pulls a Nixon-style 'Law and Order' campaign, he's going to be a perfect poster boy for fascism in the United States.
I don't think Lindy was himself a fascist, but he'd be the perfect figurehead for a Fascist government. Like the conspiracy theory that the Rabbi Benglestorf [sic] was talking about in
The Plot Against America, but more realistic and not totally insane. Say you have Lindy on the top of the ticket, but have someone like Henry Ford really pulling the strings. There's your fascist America.