1. Cult of tradition. This, I think, has the weakest link to Trump; obviously the "Make America Great Again" slogan speaks to nostalgia, but I do think Eco here is talking about a particular kind of primordial, ancient tradition that is present in European fascism. America doesn't really have the sense of a people dating back thousands of years, so we avoid it.
2. Rejection of modernism. Again, Eco is speaking here to some specific aspects of the Enlightenment vs pre-modern ways of thought, but I do think there is a connection here to Trump's focus on a manufacturing/manual labor-based middle class vs. a service sector, educated economy. He "loves the uneducated" and "wonders why we don't make anything anymore"; the modern world is too abstract and irrelevant a place.
3. Cult of action. Uh, absolutely. It's honestly hard to find a place in Trump's rhetoric where this doesn't appear. Universities are filled with effete snobs, and thinking is a form of emasculation; Trump will take action, won't listen to the so-called experts, will consult his gut, etc.
4. Disagreement is treason. Again, definitely. Trump's said repeatedly that he attacks anyone who attacks him ten times over, be they other politicians or members of the media, and promises to inflict harsh penalties on members of the press who criticize him.
5. Fear of difference. America is under attack by Muslims, Mexicans, and China, all of whom are broad categories to be feared and met with strength.
6. Appeal to a frustrated middle class. Trump's base of support are those who have seen other groups make greater strides in recent years, the white, largely (at least nominally) Christian, less-educated manufacturing class. They're definitely suffering feelings of humiliation, in part warranted, that Trump's tapping in to; he is against the free trade agreements blamed for their job loss and the social mores that have propped up other races, genders, and identities.
7. Obsession with plot. At its most obvious, there's Trump's famous view of global warming as a Chinese conspiracy to hurt manufacturing, and his perception that Obama is not born in America, and may be cooperating with terrorists ("if he's so smart, something else is happening.") Still, I'd call this debatable; Trump certainly doesn't have the obsession with conspiracy of the Nazis (although who did?) and the particular place of the Jews is different in a modern American cultural context. Not that people who are obsessed with Jewish plots aren't big Trump supporters, of course.
8. Shifting rhetoric; opponents are both humiliatingly strong and too weak. I think this is again reflected in his rhetoric on Obama; he's a weak President who isn't respected, but also a dictator trying to control your lives. This also isn't as strong, though.
9. Life is struggle. Not always a big theme in the campaign so far, but lots of Trump statements from books and interviews say, pretty directly, that he believes life is a constant struggle and you always need to be the strongest and the best. He hasn't taken this to the warmongering lengths that traditional fascists do, though; it's more of a philosophical theme than a declaration of actual war. Again, we're in a very different geopolitical context to that of early fascists, and all-out war is harder to sell.
10. Popular elitism. Hard to say. A component of fascist societies, rather than a particular trait of the leader, and we don't know what Trump's America will look like, and how much of that will have to do with Trump.
11. Cult of heroism and death. Not really. We're going to win and keep on winning. (A boot against a human face--forever!)
12. Machismo. Yup. Disdain for women and need for strength and dominance. Well-attested.
13. Selective populism. Absolutely. Trump is the voice of the people, in his own words, and derives his legitimacy from having been elected through a pretty bizarre process. Trump supporters are the real Americans, his enemies are not a part of the populace he wants to lead. "The emotional response of a small group of people" has been selected. "Wherever a politician casts doubt on the legitimacy of a parliament because it no longer represents the Voice of the People, we can smell Ur-Fascism."
14. Newspeak. Debatable, as fun as it is to link Trump's simple vocabulary to simple ideas. I'm less in the Sapir-Whorf camp than Orwell; I think Trump's use of simple sentences is more a reflection of a simple worldview than cause. But, I suppose it is hard to debate him when he has such vague positions, and those vague positions are established with the use of basic language. We're going to win. How? We're going to do it right, that's how!
I'm at work right now (oops) so this is poorly sourced and mainly based on memory. I definitely think you can apply these categories in lots of ways, depending on your political bias, and as much as I adore Eco, he shouldn't be taken as the final word on fascism and politics in general. That said... there's a lot of fascism in Trump.