I wouldn't be surprised if Trump wins re-election in 2020, but yeah I think that Republicans are in trouble. Just look at the exit polls: Clinton won 18-29 at a 55-37 proportion, and 30-44 at 50-42. Obviously Republicans have a chance at peeling off these voters (or attracting new ones) as they get older, but Republicans can't take for granted that people will vote Republican as they get older. This map should definitely concern Republicans.
A lot of these Dem-voting young voters will make their way to blue states by the time they're 40, or younger. Leaving the electoral map pretty much the same as it is now.
