I was living in Texas during the 2008 & 2012 elections and I never thought Obama would win, but that didn’t change the fact there were Obama signs and stickers in places I would have NEVER imagined would vote for Obama.
I now believe one of the best polls available is to count the signs foreach candidate. Right now Trump in a landslide according to local signs/stickers.
I live in western North Carolina and the only place I saw a Biden sign was in Asheville. Back in ‘16, I saw a lot of signs for Hillary.
Not in cities. Even in purple states the cities have few if any Trump signs and many "Anybody else in 2020" signs.
City dwellers are smart. They don't want their houses trashed by the vulgarians.