If Harris wins the rust belt, she can afford to lose all other current battleground states. This makes the road to the White House pretty straight-forward.
But given how much Trump and his buddies are flailing, Harris may very well win all other battleground states too. And if the campaign remains up at speed, there might even be additional battleground states all of a sudden, like Texas and Florida. Texas has had a lot of growth in recent years and if the people moving there happen to prefer to vote blue, it could get pretty close in the end.
Legend11 correctly predicted that GTA IV will outsell Super Smash Bros. Brawl. I was wrong.