Based on the latest PPP survey, Trump voters support slavery by more than 2—1. There seems no other way to interpret this:

… Trump voters say they would rather have Jefferson Davis as President than Barack Obama 45/20. Obama wins that question 56/21 with the overall electorate.

Anyone looking for an example of unreasoning hate that offers no compromise nor hope for justice need look no more. This is the man that Trump voters would, by a wide margin, seat in the White House.

We recognize the negro as God and God's Book and God's Laws, in nature, tell us to recognize him. Our inferior, fitted expressly for servitude.—Jefferson Davis, 1861

Deplorable isn’t strong enough. Not by half. While waving the flag of bigotry, hate, treason, and slavery, Trump supporters are eager to express who they feel is really downtrodden.

The reason Trump hasn't lost more ground for his widely panned response to the attack is probably that many of his supporters agree with some of the beliefs that led white supremacists to rally in Charlottesville in the first place. Asked what racial group they think faces the most discrimination in America, 45% of Trump voters say it's white people followed by 17% for Native Americans with 16% picking African Americans, and 5% picking Latinos. Asked what religious group they think faces the most discrimination in America, 54% of Trump voters says it's Christians followed by 22% for Muslims and 12% for Jews. There is a mindset among many Trump voters that it's whites and Christians getting trampled on in America that makes it unlikely they would abandon Trump over his 'both sides' rhetoric.

That’s why we’re seeing black churches burn and mosques bombed—because white Christians face the greatest discrimination. In what way are Christians being discriminated against? Trump supporters are upset that they aren’t allowed to discriminate more. They’re upset that their attacks on the LGBTQ community, on Muslims, on immigrants, on blacks sometimes … meet with rebuke. That’s what Trump voters view as “discrimination” against them. They can’t attack others and count on friendly nods in return.

That’s why Donald Trump’s coddling of Nazis lost him only a single point in the polls. Nazi coddling is a good thing to Trump voters.

PPP's newest national poll finds that Donald Trump's approval rating is pretty steady in the wake of the Charlottesville attack, probably because his supporters think that whites and Christians are the most oppressed groups of people in the country. 

Fortunately, Trump voters don’t represent the entire country.

… for the fourth month in a row we find a plurality of voters in support of impeaching Trump- 48% say he should be impeached to 41% who disagree. And there continues to be a significant yearning for a return to the days of President Obama- 52% of voters say they wish Obama was still President to only 39% who prefer having Trump in the White House.

That widespread dislike for Trump translates into hopeful numbers when it comes to 2018:

Things are continuing to look good for Democrats in 2018, as they lead the generic Congressional ballot 49-35.

And for 2020.

Trump continues to trail both Bernie Sanders (51/38) and Joe Biden (51/39) by double digits in possible 2020 match ups. PPP never found Hillary Clinton up by more than 7 points on Trump in 2016. Sanders and Biden each win over 12-14% of the folks who voted for Trump last year. Also leading Trump in hypothetical contests at this point are Elizabeth Warren (45/40), Mark Cuban (42/38), and Cory Booker and Trump Twitter Target Richard Blumenthal (42/39). 

Which is good. Only … it doesn’t erase the overwhelming repugnance of the views expressed by those who support Trump.

Overall 39% say they support monuments honoring the Confederacy… Trump voters support them by a 71/10 spread- to put those numbers into perspective only 65% of Trump voters oppose Obamacare, so this is a greater unifier for the Trump base.

Racism and treason. Those are the causes that bring Trump voters together.