We don't have a dictator in the US. And every single president we've ever had has claimed to represent the will of the nation.
While Trump is not a full dictator yet, he is certainly taking the country in that direction.
We still seem to have a pretty healthy representative democracy
Umm, no you don't.
Currently, the US is best described as an anocracy... a system of government which has the look of democracy, but there are certain aspects that prevent elections from being free/fair. For example, the US has widespread voter suppression and gerrymandering.
...with both major parties well represented throughout all levels of our governing apparatus. Indeed, it looks like about half the states in the union have Democratic governors. The House is 49% Democrats, the Senate is 47% Democrats.
Yet despite the fact that the Democrats have "almost" half of congress, they have very little political power. The republican tax cuts were forced through despite universal opposition from the democrats, and they regularly vote against Trump's nominees for cabinet and judicial spots, but despite that Drunky McRapeface and the Stepford Wife are still there to support Trump o the supreme court. And Trump has been taking actions that in theory should be under the role of congress but he has usurped power by declaring everything "an emergency".
Having a bunch of democrats in congress doesn't really show "democracy is healthy" if their concerns are regularly ignored.
Meanwhile, the the republicans have only got a majority of the popular vote once since George Bush Sr. was in office (and even when they win elections they often lose the popular vote). Yet republican nominees dominate the supreme court.
I suppose you could make an argument that deploying the national guard to some areas might be considered militarism. I don't see that violence is being glorified or used as a purifying tool.
Renaming the department of defense the "department of war"? Holding a military parade on Trump's birthday? Trump bragging constantly about how we have "jets you can't see" and will build a "golden dome"? Sounds pretty militaristic to me.
Suppression of opposition: Opposing political parties, labor unions, and other dissenting groups are forcibly repressed to remove any challenge to the one-party state.
Yeah, this doesn't seem to be happening.
Trump has called the media "fake news" and posted a video of himself "symbolically" attacking them. He has had the government threaten legal action against people he doesn't like. (And remember his administration threatened various law firms that he would cut access to government buildings if they did not provide "free legal services", just because they represented people Trump didn't like.)
Scapegoating: Fascist movements often rely on the demonization of internal or external "others," such as ethnic or religious minorities, immigrants, or political opponents, to unify the population.
Illegal entrants to the US has been a problem for a long time.
Actually no, they haven't "been a problem".
There have been illegal immigrants, but the fact is the vast majority of them live peacefully in the U.S., and in fact they tend to commit property and violent crime at a lower rate than natural born Americans. They do not use services like social security, yet many of them pay taxes, giving them a net benefit to society. In other words, they were not a "problem".
Yet despite that Trump implied "Mexico is sending rapists", and "Haitian immigrants are eating dogs". Sounds like he's demonizing "evil brown people" for crimes they are not committing.
Social hierarchy: Fascism promotes a belief in a natural social hierarchy and an inherent inequality among different groups.
Also not happening so...
The Trump administration has a record number of billionaires. they have also proposed a "gold visa" for rich people to get instant citizenship.