Yes, I think the "bubble" explanation is actually too simple. It's clear that the American people disagree with the powerful bureaucrats who control Washington on various policies. I see Trump's election at least partially as a repudiation of the status quo on a variety of policies which Washington has been busily ignoring for decades.
I remember “liberal” and “conservative” media empires before the web...
I remember gerrymanderred 50/50 political races before the web...