The problem is that America is not in a terribly healthy democratic state, and pretty much all of the indicators show it. At best, America is a "flawed democracy" ala The Economist. The worst evaluations label America as a "hybrid regime" / "competitive authoritarianism" / "electoral autocracy" or many other terms to describe a democracy-on-the-surface that has, in reality, become heavily titled in favor of one party rule.

The problems extend well beyond one party (see: Citizen United), but to me, the "fascism"-ish stuff is mostly concentrated on one end. It has been clear for a long time that the Republican Party has embraced the "illiberal democracy" model of Viktor Orbán. Orbán's government never got to the full-on violent oppression used in actual autocracies, but instead used many of the tools that the Republican party uses today to attempt to stay in power. That being: gerrymandering and other aggressive vote meddling; media manipulation (not full on censorship, but attempting to ensure that dominant media voices were party line); propaganda using social / culture war rhetoric; and government pressure on institutions (schools, businesses, etc.) to destroy independence, and force conformity to the party line.

There are differences between the two -- Orbán never attempted anything like ICE or the immigrant detention camps, but Orbán was able to capture the judiciary better than Republicans have so far. But it's the closet comparison I can think of.

Some of the characteristics of the "Orbán style" do share some similarities with fascism... however the "Orbán style" lacks classic fascism (along with the more direct cousin of "the Vladimir Putin style")'s full on authoritarianism. But as the above demonstrates, there isn't a term right now that neatly encapsulates hybrid governments at the moment, so I guess that is why folks are running with the term everyone knows. Besides, there is always the danger of a hybrid regime backsliding into an authoritarian regime. Russia, who many do see as a modern flavor of authoritarian fascism at present, was rated as a "hybrid regime" in The Economist in 2006.