I'll address the comments about Liz Cheney by telling you what Harvard Professors Ziblatt and Levitsky say about how democracies die and how they are saved.
(The book is fabulous and was quite timely when it came out in 2017)
Basically, they said this (page 299):
In a two-party system, when the head of one of the major parties (in this case, Trump) goes off the deep end and embraces autocratic methods, what will save the nation is for Republicans to vote Democratic . . .
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