Well, if enough people voted for Trump to secure the electoral votes needed, then, yes, he’s mainstream. It’s a thought from many Americans (and others) who aren’t suffering from one kind of mass psychosis or another recoil.
In what sense is his White Supremacy not mainstream, given the “Southern Strategy” of his Party, actions leading up to the Black Lives Matter movement, continuing Jim Crow voter-suppression (abetted by the Supreme Court), and the bizarre (if predictable) over-reactions to a middle-of-the road, prepared, pragmatic Black President? Trump want to fire Sessions, not because the latter is a homophobic segregationist but because a proper investigation continues.
In what sense are his excesses, profligacy, proud ignorance, environmental nihilism, greed, and grifting not mainstream American? Judging from what I hear and see at my nondescript liberal arts college, I would guess more than a few academics, even, are okay with Trump’s anti-political-correctness, anti-Obama, nobody-knows-the-trouble-White-folks-have-seen, misogynist persona.
Why would so many American “Christians” vote for and continue to support Trump if he weren’t mainstream?
The idea that if “we” could just get rid of Trump, then everything would get back to “normal,” may be a necessary delusion; who knows? But the real problem is that “normal” is Trump and Trump is normative, if more crudely direct. After all, the GOP Congress and Supreme Court do his bidding. It’s not like they oppose him in any meaningful way.
A deeper problem is that the U.S. has never truly addressed its White Supremacist core values, its cultish attraction to unregulated capitalism and the long-con of “trickle-down” economics, its unrelenting baiting of the White working class, its military-industrial complex, and its ultimately self-destructive (in addition to destructive) view of its home, Earth. Now one reads article after article about how “liberals” (whatever that means) must learn how to appeal to White working class people, which is really a way of saying that we need to pretend what many of these people believe is hideous. Also, the articles overlook the fact that a majority of White suburban men and women went for Trump, so apparently class isn’t the determining variable.
To me, Trump just looks like a inevitable result of American history, economics, and education. He is America, particularly White America (and in politics, that’s still mostly what matters).
What people who recoil from Trump need to do is to recoil (and then do something about) all the things that make him American, as opposed to making excuses, minimizing, wilting under charges of “political correctness,” and remaining in denial. From its colonial inception, the country/nation has been as sick as a dog that drank anti-freeze.