A brilliant and hard-hitting analysis and commentary that went deep into the subject of what's happening politically in this country in the wake of Tuesday's election results was offered by Tucker Carlson halfway into his Fox News program (8 P.M. E.T.) Wednesday evening.

The takeaway from the three major contests in Tuesday's state and local elections was variously interpreted, depending on the ideology of the analyst.  It was either the beginning of the end for President Trump and the Republicans – a predictor of a coming "blue wave" Republican rout in 2018, according to Donna Brazile – or a potential anomaly that does not reflect the true mood of the larger anti-establishment electorate that resulted in President Trump's victory one year ago.

The fact is that the Democrats enjoyed significant built-in advantages in the governors' races in Virginia and New Jersey and the New York City mayoral contest that pretty much assured their victories by overwhelming margins.  In Carlson's opinion, the Dems were also aided in Virginia by stooping to an ominous new low point.

Tucker Carlson delivers his analysis, Fox News, Nov. 8, 2017.

Courtesy of Fox News, here is an internal transcript of Carlson's commentary.  A video of the three-and-a-half-minute segment, titled "Dems embraced dark side of politics to win Virginia," can be watched here.

TUCKER CARLSON:  Last night's elections were pretty awful for Republicans.  Bill de Blasio, who is probably the least impressive mayor in the United States, easily won another term in New York City.  Democrats took the New Jersey governor's mansion installing yet another Goldman Sachs alum in a position of political power.

In Washington State, Democrats won the Senate and with it, total control of state government.  But Republicans have their very worst night in Virginia.

Ralph Northam beat former RNC Chairman Ed Gillespie by almost nine points. That is three points more than Hillary Clinton's performance in Virginia last fall, it is almost seven points ahead of Governor Terry McAuliffe's win four years ago in Virginia.

Yesterday morning, to put it in perspective, Republicans had two-thirds of Virginia's House of Delegates.  Now, depending on how a few races shake out, Democrats could have a majority.  It was a rout.  How did it happen?

Well, Donald Trump is unpopular in Virginia, and that's definitely part of the reason, but it's not the whole story.  Democrats won after embracing the dark side of American politics, exploiting racial fears and deepening tribal divisions.

In real life, Ed Gillespie was a pro-immigration moderate. By the end of the race, Democrats and their reliable allies in the press were dismissing him as a White supremacist.  Northam's allies ran the single ugliest political ad in living memory. It charged that Republicans want to hunt down and murder nonwhite children.  The ad didn't make a political argument, it didn't take a position on taxes, or crime, or the environment, or schools, or anything that might make the state or the country a better place.

It's only purpose was to terrify and divide.  This is the politics of racial hatred.  Vote for me because the other guy wants to murder your kids.  Our opponent isn't misguided, he's evil.  There is no defending an ad like that, but Democrats did it anyway.  In a normal party, someone with perceived moral authority would have stepped forward to denounce the ad.  Barack Obama, maybe or Bill and Hillary Clinton, but all of them were silent, and allowed the race baiting to continue in Virginia, and it did.

This is an ominous development in American politics, precisely because it worked so well.  Democrats across the country inevitably will imitate what just happened in Virginia and they will probably win a bunch of races as a result.  You would think they would care about the consequences of sowing racial division in an already racially divided country, but they care about winning more.

Northam's victory tells you a lot about the Democrat strategy going forward.  The party has all but stopped making rational arguments or even trying to win swing voters over to its positions.  That is time-consuming, it requires compromise.  It's much easier to change the composition of the voter base. 

More than 50 years after Ted Kennedy's immigration act, it's no longer even necessary for Democrats to win native-born, middle-class Americans who work in the private sector, so they stop trying.

Virginia has transformed politically because it has been transformed demographically.  For example, in 1970, one percent of that state was born outside the United States.  Today that number is 12 percent.  Twelve percent of Virginia is foreign-born.  That has made all the difference.

So, if you are wondering why the idea of national borders is suddenly so unpopular among Democratic officeholders, if you're wondering why the deadly plague of opiate addiction in Middle America causes barely a stir in Washington, now you know the answer.  They are not their base anymore, they've replaced you.

Peter Barry Chowka is a veteran reporter and analyst of news on national politics, media, and popular culture.  Follow Peter on Twitter at @pchowka.