Trump is likely to win if Democrats can't get their act together and run on a message that voters in states like Michigan, Pennsylvania, and Wisconsin can buy into. Right now, they seem to want to double down on their 2016 strategy, which is not going to help.
If they run on identity politics and believe that Georgia is more winnable than Wisconsin, they're going to lose.
If things continue in their current direction, Georgia very well might be more winnable for the Democrats than Wisconsin in 2020.
I highly doubt that. Even if Wisconsin is starting to go the way of Missouri, which I doubt for reasons I've outlined on other threads, I don't think Georgia flips in 2020 barring a Democratic wave. Trump's performance in the state in 2016 was already quite bad, and I don't see him doing significantly worse unless he's having a bad night nationally. I'd say Wisconsin is a Toss-Up, while Georgia is Lean if not Likely R.