my in-laws are probably pretty average Americans, college-educated but not overly political, tend to vote Republican but not dogmatic about it.
They've only paid (moderate) attention to the whole thing (and then mostly because we live over here), and their general impression is one of a giant "WTF have they done, they are insane". That's also the feeling of one particular member of the family who I'm 90% sure is going to vote Trump.
Probably says more about the way the American media are reporting the story, than about my in-laws.
I'll also reiterate that in my view the vast majority don't care and don't see how it has any bearing on American politics. It's a bit like asking if the result of the New Zealand flag referendum is going to affect the next British General Election. (exaggerating, but barely)