It's pretty obvious Drumpf speaks to an underlying current of attitudes in the American electorate that goes far beyond himself, yeah.
That said, it's equally obvious that there's no Drumpfism properly speaking.
I would also say that the group of people he speaks is only a small plurality and mostly older, white working class voters. That demographic is disappearing either through death or education, on top of being marginalized by exploding eligible minority voter growth.I wouldn't be quite as optimistic in this regard. Drumpf's success is tapping into a fundamental trend in Western democracies that we see in Europe as well. There's an increasing number of people that, both for cultural and economic reasons, feel increasingly threatened by globalization and the erosion of strong nation-States. This translates into rejection of a wide range of policies like free trade and immigration (and of course, in the European context, the EU). The problem is, due to how globalization works (especially because of how it generates economic insecurity), the is a lot of people who has lost and will keep losing from it. These "losers" (
that's Kriesi's term, not mine), while they will probably never be a majority, will continue to represent an important constituency in the US, and it's very possible that the might control the GOP in the decades to come.
The good news is that a candidate who takes inspiration from Bernie might find an appeal among this electorate, especially if they manage to make the case that the real enemy are corporations and millionaires, not immigrants. But regardless, it is a force to be reckoned.