What about developments at the national level? That’s where things get really scary. We’re currently sitting on a knife edge. If we fall off it in the wrong direction — specifically, if Republicans retain control of both houses of Congress in November — we will become another Poland or Hungary faster than you can imagine .

This week Axios created a bit of a stir with a scoop about a spreadsheet circulating among Republicans in Congress, listing investigations they think Democrats are likely to carry out if they take the House. The thing about the list is that every item on it — starting with Donald Trump’s tax returns — is something that obviously should be investigated, and would have been investigated under any other president. But the people circulating the document simply take it for granted that Republicans won’t address any of these issues: Party loyalty will prevail over constitutional responsibility.

Many Trump critics celebrated last week’s legal developments, taking the Manafort conviction and the Cohen guilty plea as signs that the walls may finally be closing in on the lawbreaker in chief. But I felt a sense of deepened dread as I watched the Republican reaction: Faced with undeniable evidence of Trump’s thuggishness, his party closed ranks around him more tightly than ever.

A year ago it seemed possible that there might be limits to the party’s complicity, that there would come a point where at least a few representatives or senators would say, no more. Now it’s clear that there are no limits : They’ll do whatever it takes to defend Trump and consolidate power.

This goes even for politicians who once seemed to have some principles. Senator Susan Collins of Maine was a voice of independence in the health care debate; now she sees no problem with having a president who’s an unindicted co-conspirator appoint a Supreme Court justice who believes that presidents are immune from prosecution. Senator Lindsey Graham denounced Trump in 2016, and until recently seemed to be standing up against the idea of firing the attorney general to kill the Mueller investigation; now he’s signaled that he’s O.K. with such a firing.

But why is America, the birthplace of democracy, so close to following the lead of other countries that have recently destroyed it?

Don’t tell me about “economic anxiety.” That’s not what happened in Poland, which grew steadily through the financial crisis and its aftermath. And it’s not what happened here in 2016: Study after study has found that racial resentment, not economic distress, drove Trump voters.

The point is that we’re suffering from the same disease — white nationalism run wild — that has already effectively killed democracy in some other Western nations. And we’re very, very close to the point of no return .

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