If the voters don't eventually punish the Republicans who are calling for a de facto coup, then we have to conclude that a substantial number of Americans no longer believe in our democracy either.
I should note that the decline in support for liberal democracy was pointed out by many, including @Yascha_Mounk and Roberto Stefan Foa, several years ago https://www.journalofdemocracy.org/articles/the-danger-of-deconsolidation-the-democratic-disconnect/
Also, the work of Karen Stenner, which is cited in my book, Twilight of Democracy, suggests that in any population there is a large percentage of people who are uncomfortable with democracy; she suggests that we ought to find ways to reach out to them