It turns out - from 10 minutes of intense Googling - that "nobody knows." 😄 I assume that you were suggesting that it's communism, Marxism or socialism (and I assumed that that was true) but I can't find a source that clearly and unequivocally agrees. That said, Trump is the least reliable source. 😁
Fascism, actually. By Mussolini's own definition, and he'd know since he coined the term: "the marriage of government and the means of production". Not socialism, because socialism implies that the government is of, for and by the people, meaning the people are part of the means of production.
My point - and I do have one - is that *scholars* don't (seem to) agree. Sure, Benito can (and usually did) say whatever he liked. If I say "I'm the king of France" most would agree that I'm not the King unless there's concurrence by, you know, FRANCE. (And, eventually, "history") #NotDisagreeing