Well, in the recent presidential election, Hillary Clinton won both the entire West Coast and the entire northeast, but very little else. (She did manage to win Minnesota--albeit by a much smaller margin than Democratic candidates normally do--and Virginia; the latter, due to the tendencies of Northern Virginia, near DC, which has propelled the state into the Democratic ranks.)
And, of course, Hawaii. And Nevada and New Mexico (the latter's having a very large Hispanic population).
Do Democrats really believe that they can continue to ignore the folks in "Flyover Country"--perhaps even display open contempt for them--and still win national elections?