There are a lot of indicators pointing one way or the other. I think polls could be way off on Trump, but in either direction this time.
The most compelling thing I've seen is registrations and ballot requests have moved very significantly Republican in key swing states. But the Dems have a much better ground game, and they're very good at turning out "lean Dem unlikely voters".
I expect surprising results, potentially going either way, to give us another very contested election result. But seems like that's becoming status quo. And if Trump wins I fully expect Dems to try yet some other means to keep him out of office.