Mark Bauerlein is a professor of English at Emory University, senior editor of the journal First Things and author of "The Dumbest Generation: How the Digital Age Stupefies Young Americans and Jeopardizes Our Future; Or, Don't Trust Anyone Under 30." The opinions expressed in this commentary are his own.

(CNN) This is the real battle going on in DC today: not Democrats vs. Republicans but President Donald Trump vs. establishment Republicans. Trump is trampling upon every taboo and sensitivity that liberalism has erected in the last 50 years, and Republican leaders have learned to get by in that uptight habitat.

With a tax plan inching forward in stops and starts, Roy Moore's numbers , in his US Senate run in Alabama, rising (the President has now even endorsed him), and liberal eminences in politics and media facing sexual allegations that may be worse than those made against Trump, the anti- and never-Trump forces are in a worse state of incredulity than before.

How can this guy still be chief executive -- and even winning?

At first their surprise might seem sensible: A few weeks ago, things looked bad for Trump. Health care reform was stalled , Roy Moore was behind , and the Virginia results foreshadowed a Democratic Senate to come . The time has been out of joint for long enough, Trump's critics believed, and the correction was finally happening.

Indeed, we saw another setback on Friday, with Michael Flynn pleading guilty to lying to the FBI, and fingers now pointing at Jared Kushner. But after all the other controversies that have happened and haven't much damaged Trump himself, people can't help but see this one as another sign of corruption that just won't stick. Just hours later, the Senate passed the tax bill.

JUST WATCHED WH cites Trump agenda for backing Roy Moore Replay More Videos ... MUST WATCH WH cites Trump agenda for backing Roy Moore 03:12

And now, the needle seems to tilt Trump's way.

This correction is not that hard to understand. You see, Trump has an invincible ally at the far end of the ideological spectrum. I don't mean the extreme right, the nationalists, paleoconservatives, and fringe groups that the media relentlessly tie to the President. He has better friends at the other pole, people on the far left who see the world only through the lens of race, gender, sexuality, and victimhood.

In the Chronicle of Higher Education last week, Brittney Cooper, a professor at Rutgers had this critique about the legacy of Galileo, Newton, Pasteur, and Einstein: "The history of Western thought and science is predicated on the argument that African and indigenous peoples are inferior races."

That's right -- all those inventions and discoveries that we honor and the geniuses we remember had a racist underside, by her lights. Elsewhere in the article she wrote, "No questions have ever been off-limits for white scholars," a statement that would surprise every white scholar I've ever known.

People who still can't assimilate the ascent of Trump need to pay closer attention to these accusations. They're not uncommon. Sensible liberals shrug them off as, well, kind of true but not really significant to health care, the environment, reproductive rights, and other progressive planks.

JUST WATCHED Trump's fired campaign manager writes book Replay More Videos ... MUST WATCH Trump's fired campaign manager writes book 01:27

But people who voted for Trump have become especially attuned to such charges, and it only takes a quick playback by Rush Limbaugh or Tucker Carlson of the day's denunciation of America, white males, or the West by Professor X, Opinionator Y, or Celebrity Z to stoke their sense that the intellectuals loathe them. The more the accusers talk, the more rock hard Trump's base becomes.

The remarkable thing is how many Republican leaders still haven't figured this out. After Trump dropped his Pocahontas remark at the meeting with Navajo veterans, Sen. John McCain berated him for "politicizing these genuine heroes."

Never mind that leftists have relentlessly politicized every demographic group in the country. Trump voters feel that by invoking her make-believe American Indian heritage, Sen. Elizabeth Warren played on those very identity politics to advance her career and mark her as more worthy of an elite job than any old white man.

Last week, when Senate Majority Leader Mitch McConnell acknowledged a pending ethics probe of Roy Moore should he win the election and take his seat, Laura Ingraham had to remind him of what that would say to Alabama voters. He came off as believing that the will of the people is one thing, but the will of the Senate is another.

The culture wars and Twitter spats that Trump has fought have delighted his fans but cornered senators, who may be realizing that the opinion of the Great Unwashed is more important than the opinion of, say, The New York Times -- more important, that is, to their job security.

JUST WATCHED Trump: We need Republican Roy Moore to win Replay More Videos ... MUST WATCH Trump: We need Republican Roy Moore to win 02:23

When you sit at the top with an office in the Capitol and people lining up to tell you how wonderful you are, an academic on MSNBC going on about white privilege, toxic masculinity, and cisgender bias doesn't bother you.

Nor does a school board that approves opposite-sex bathroom privileges for transgender students and casts concerned parents as "phobic."