I think too many progressives formed an opinion of the typical 2016 Trump voter that was badly flawed, and I’ve been saying this from the nearly the day after the election. The problem is that high-information voters saw all the racist things that he said and all the violence against women he had committed, and they assumed that everyone else had both heard all those stories and that they credited them as indisputably true. As a result, the assumption was that Trump’s voters were all racist and misogynistic, or least intolerably accepting of those traits in a U.S. president.

A lot of progressives also persist in thinking that all these voters are irredeemable. None of them are capable of seeing the light and nothing can shake their support for Trump.

Here’s just one example of why these assumptions and not true:

At the Rusty Willow Boutique, an upscale women’s clothing shop [in Culpeper, Virginia] that was preparing for its grand opening, just the mention of Mr. Trump prompted a squabble between Sonya Pancione, 57, the shop’s owner, and Denise Reynolds, 50, one of her best friends from church. Ms. Pancione is dead-set against impeachment.

“Respect the office. It’s a democracy. People voted for him,” she said.

Ms. Reynolds loathes Mr. Trump and blames him for inciting racial hatred. She was once excited about his candidacy — “I thought we needed somebody who understood business in that seat,” she said — but says now that if he were impeached and removed from office, “it would not upset me in the least.”

It’s easy for me to mock Ms. Reynolds. She had all the information she needed in 2016–literally at her fingertips on her smart phone–to understand that Trump was inciting racial hatred and also that his reputation as a savvy and successful businessman was more reality show than actual reality.

But she supported Trump because she thought his business acumen would be good for the country. The Democrats and Republicans had been trading presidents for decades and communities like Culpeper in rural Virginia continued to see their quality of life slip and degrade. Why not put someone in there who was different and would skake things up?

Who knows when his racism finally got to her. Maybe it was after Charlottesville in August 2016. Maybe it was when he talked about the African continent being filled with shithole countries. Maybe it was when he started separating Latinx children from their parents at the border. The possibilities are endless, but she understands it now and it makes her sick. She’d be happy to see Trump impeached.

There are probably a lot more 2016 Trump voters like Sonya Pancione than like Denise Reynolds. Polling data certainly supports that supposition.  But it doesn’t take much erosion of Trump’s base of support to make him unelectable in 2020. Where is he going to pick up new support?

The problem, I think, is that high information voters simply don’t understand how low information voters think. How, for example, can 2016 Trump voter Don Foster still be uncertain about the president’s guilt? Doesn’t he have a television and an internet connection? Doesn’t he know where to get actual news reporting rather than right-wing partisan spin?

And in Westerville, Ohio, a suburb of Columbus that will host a Democratic presidential debate Tuesday, Don Foster, who voted for Mr. Trump but no long supports him, said he found the latest allegations as more dire than those investigated by the special counsel, Robert S. Mueller III, involving Russian interference in the 2016 election.

“This one seems more true than the Mueller report,’’ he said. “I’m guessing that Trump really is guilty, I just don’t know yet.’’

But does it really matter if this man doesn’t seem to be able to obtain and process the basic information that is already available in this case? He’s already lost to Trump and seems inclined to believe his removal from office would be justified.

I have no idea why Mr. Foster overlooked all of Trump’s obvious flaws in 2016. I don’t really care very much either. He’s seen the light now, and that’s good enough for me. Elections are about getting the most votes and not about making sure all your supporters have enlightened and well-informed opinions on every topic.

The Democratic presidential candidate in 2020 can and will win a lot of votes from 2016 Trump supporters. This is not a bad thing but a very good thing.