American fascism is not like German Nazism, and as others have mentioned, is more akin to Italian Fascism. The Americans are neither as focused or as organized, and like Italy, Spain, and perhaps Chile, lean on traditional values, machismo, and religion more. They're possibly less organized than those three countries, as well.

All political ideologies, including fascism, mold themselves to fit our particular time and material conditions. In that light, the fascists can't help but change as well.

So, I don't think it will be a step-for-step repeat, but will it be a fascist rising? Probably. Will there be a far left, that is anarchist or communist that opposes it? Probably. What is causing all of this? The failure of the capitalist center politicians and political ideologies to be relevant and helpful for the great masses of the people.