Seeing Michigan vote for Donald Trump has been a shocker since that state seems to pull through for Democrats in the end.
Democrats were way too overconfident about PA and that stupid Blue Wall crap. There was a huge trend towards the GOP between 2008 and 2012 which should have set off big warning signs. Obama only won PA by 5 while winning nationally by 4. That was a pathetic margin compared to the national average. The West Virginianization of SW PA is only going to get worse.
I don't get the logic behind calling a bunch of swing states the "blue wall".
The reason is because they kept voting Democrat in presidential elections for a long time (over twenty years).