Many on the left see him as the second coming of Adolf Hitler. Despite Godwin's Law, Jim Kunstler wrote, "As for [the real-estate developer], he remains what I said at the campaign’s outset: worse than Hitler, lacking the brains, charm, and savoir faire of the Ol’ Fuhrer, and with his darkness even more plainly visible."
Google [the real-estate developer] and Hitler, and you got 5.6 million results as of today.
In an interview, New Left warhorse Noam Chomsky gave a more nuanced but still Weimar-y assessment of the reasons behind [the real-estate developer's] surprising strength:
Fear, along with the breakdown of society during the neoliberal period. People feel isolated, helpless, victim of powerful forces that they do not understand and cannot influence. It’s interesting to compare the situation in the ‘30s, which I’m old enough to remember. Objectively, poverty and suffering were far greater. But even among poor working people and the unemployed, there was a sense of hope that is lacking now, in large part because of the growth of a militant labor movement and also the existence of political organizations outside the mainstream.
But let's calm down for a moment and note a few important differences.