Short answer: no. I don't think Trump is the Antichrist. But I have a reason for raising the question, which I will get back to after a backgrounder.
Prophecy teachers are always on the lookout for the Antichrist–and related events. Prophecy teachers write books and serve as keynote speakers at prophecy conferences. There's an insatiable appetite for this sort of thing.
Now, I don't necessarily say that as a criticism. The Bible contains a number of prophecies which remain outstanding: mainly centered on the return of Christ and related events. Christians should take an interest in future prophecies. We are exhorted in Scripture to be watchful.
I think it's safe to say that John Walvoord was the most prominent prophecy teacher of his time. Among other things, he wrote Armageddon, Oil and the Middle East Crisis. That was first published in 1974. 16 years later, he published a revised edition. Then 17 years later, he published another revised edition, under a new title: Armageddon, Oil, and Terror.
Notice the pattern: He sticks to the same basic script, but changes names and dates to make it more contemporary.
Yet what this means is that his original projections were wrong–repeatedly. That, however, doesn't cause him to go back to the drawing board. Instead, he just updates the plot. The actors change, but the play remains the same. Same characters, different names.
Surely, though, that goes to a deeper problem which requires more than superficial revisions to rectify. Why did he keep missing the target? Because he entertained false expectations. Yet he doesn't question his expectations, which is why he repeats the same mistakes.
Suppose the Antichrist is not what we expect him to be? Indeed, it would hardly be surprising if the Antichrist had a hidden agenda. If he concealed his true intentions.
In other words, there might well be a difference between how the Antichrist presents himself in his rise to power, and what happens once he achieves power.
Due to false expectations, many Christians could be blindsided. The Antichrist didn't fit their profile. If they suppose the Antichrist will resemble a villain in a James Bond movie, they may be surprised. Ironically, this means some pious Christians could unwittingly be political supporters of the Antichrist in his rise to power.
Let's take a few comparisons. Consider Lutheran NT scholar Adolf Schlatter. He was theologically very conservative by German standards. And he was quite philosemitic by German standards. Nevertheless, his views on Nazism and the plight of German Jews are highly ambivalent. Cf. Anders Gerdmar, "Adolf Schlatter and Judaism," Roots of Theological Anti-Semitism: German Biblical Interpretation and the Jews, from Herder and Semler to Kittel and Bultmann (Brill Academic Pub, 2008).
In our own day, evangelicals like Craig Blomberg and Darrell Bock both voted for Obama. In principle, some Christian conservatives might unintentionally throw their support behind the Antichrist, in his ascendancy, because he's not what they anticipated. By the time they catch on, it's too late.
Likewise, there might be prophecy teachers who support Donald Trump, even though he has the piety of a Borgia pope, because they think his candidacy is a bludgeon to the Republican establishment. In theory, they could be backing the Antichrist, but fail to recognize his true character and agenda, because they have a mistaken preconception of what the Antichrist will be like.
Never underestimate the power of an orator. Hitler was a great orator. Many voters were swept away by Obama's oratory. And it's disturbing to see how Trump has cast a spell over some conservative voters and pundits through his oratorical posturing. For whatever reason, some people just don't know a showman when they see one. They allow themselves to be manipulated by a flimflammer. This can happen to good people who ought to know better. It's not the first time–and unfortunately, it won't be the last time.