So, recently Trump has been getting some fairly awful results in swing state polls while national polls have tightened a bit. It is fairly likely that is noise, i.e. that Trump is getting a little unlucky in state polls but lucky in national polls and things will even out. But...

...one alternative explanation is if Trump is making gains in red states, perhaps consolidating his base especially in states with no Biden ads running, which we wouldn't know very much about because most pollsters aren't polling, say, Idaho very much.

Anyway, Quinnipiac should have polls of SC and KY out later today which can help us to test this theory. Again, I don't think it's super likely, but there's a lot of "dark matter" when comparing national and state polls because ~2/3 of Americans don't live in swing states.

So, a bit of a mixed bag here. Trump's lead expanded to 20 points in KY from 9 in Quinnipiac's previous poll. But South Carolina is largely unchanged (Trump +6 vs +5). Biden has a huge lead in Maine (+21 ?!?) meanwhile. https://poll.qu.edu/kentucky/release-detail?ReleaseID=3673

Maine is pretty similar in certain respects to Wisconsin/Minnesota, so not surprising to see Biden polling well there given his strong polling in WI/MN lately.