Turnout by Cubans for Trump is fearsome, and new Venezuelan immigrants to USA are also. And there is some shift for Trump among some part of other hispanic. Miami Dade has such a shift for Trump over past elections that it will be hard for Biden to make it up elsewhere.
An even bigger story is the shift in black support for Trump. Young male working blacks have an earthquake shift in favor of Trump that is throwing the whole election in several states
I think biggest support for Trumpwill show up in low voter turnout by Dems.