Just saying, after the 2008 Elections, the GOP was deemed as a regional party also..
People are overthinking results.
Nope, the Dems are trending away from winning the EC. Their ratio of number of votes to EC votes gets worse and worse...Repubs get better and better.
Nope,
I suspect in 2020 Democrats should be able to win MI, PA, and WI back. They would be highly competitive in Arizona, and I would actually expect them to win Georgia in 2020 if there is any investment. Virtually there was no investment in Georgia this cycle, and Clinton did relatively well.
In fact, if Trump can not keep his promises, I suspect Ohio and Iowa will be contestable.
And in 2020, I doubt Missouri and Indiana will be going to Trump by 20 points. Sure, it would be no additional electoral votes, but it helps down the ballot.