Single most in danger Clinton state of switching

[UncleSam]

Went with Nevada but New Hampshire is definitely possible as well. Nevada was a state many thought was leaning Trump before the Access Hollywood tapes came out (though in retrospect the Latino turnout was probably always being underpolled there), and it's not hard to imagine him doing a bit better with Latinos if he is a moderately successful president and doesn't insult any more Mexican judges / all Mexican immigrants / etc. - look to Heller's race in 2018 for how Trump might do there in 2020.

I think Minnesota isn't going to flip, there's a lot of Democratic strength there that probably didn't figure it needed to show up because it was never seen as seriously contested. Virginia is probably a state to look to if Republicans do well in the 2017 / 2018 statewide gubernatorial / senate races there, but otherwise no.

Honestly Trump's more likely to be playing defense than offense however, even if he is relatively successful.