The Republicans have not acted in the American people's best interests for a very long time now, drawing attention away from their shortcomings by blaming some boogeyman for why things can't be any better than this. Working conservatives were already frustrated with the impotency of the mainstream GOP (still are, judging by the way their town hall meetings are going) and all Trump needed to do was dispose of the dog whistles and use a bull horn to own up to these stances to greater extremes than most candidates would have been willing to go to, giving him the image of being "strong". A figure like Trump was predicted years ago. This all should have been a gift from heaven for the Democratic Party, but instead it is curiously they who have lost every branch of government, the Supreme Court soon to follow, with Obama handing the keys to the White House to his most prominent nemesis as ex-Democrats hemorrhage out of the party in disgust and frustration. All the while, the party grows more and more to resemble the Republicans, taking so much corporate money and demonizing foreign bodies. Wikileaks and Comey might be blamed for Clinton's loss, but the whole party coming undone at the seams not so much.
This is a very bad omen, as it is important to have an opposition party for balance, especially against the kinds of ideas the Republicans push. Preferably opposition based on policies and ideas rather than "We oppose $CurrentPOTUS, but we don't have any good ideas of our own." Unfortunately it appears the Democrats would prefer their slow death to the medicine needed to get better, and that does not bode well for next year, much less 2020.