I don't think at this point there is any big incident that will bring a new surge of support, unless they care a lot more about this Hunter story or Amy Covid Barrett than they seem to. I do think there is a huge amount of support for Trump that doesn't show up properly in national polling - the swing state polls are tight enough that it could be an extremely close race. And if it is, that's all Trump, SCOTUS, and the media need.
I did read that some of the big Republican counties in Florida have had their early voting hours cut because of a hurricane, so that might make a difference.
Anyway, in less depressing moments, here's a great commentary from Amber Ruffin.