I think he gets the states he won in 16 and perhaps VA,NV,MN and one other. Then again I never thought Reagan would win as big as he did in 1984, but he did so.
I gave it some thought, and these are the most likely Blue-Red "flips" in 2020:
1. New Hampshire
2. Minnesota
3. Nevada
4. Maine
Colorado or Virginia would probably be #5.