I agree with those saying this isn't the end. Trump will be horrible, but we've had horrible presidents before (though I see Trump being worse than most), and are still here. In terms of policy, I don't see him realistically, constitutionally being able to pass 90% of his campaign rhetoric, let alone in 4 years. My main concerns are what precedents this election sets for the future -
1. A candidate with 0 political experience can win the presidency.
2. A candidate can offer next to no policy stances of substance here or abroad, and still win. Remember the days of nitpicking who's foreign policy was better during the debates?
3. A candidate can run on a platform with racist, misogynistic undertones, and win.
4. A candidate can openly insult his opponent's looks in what should be a serious campaign, and get cheered.
5. A candidate successfully divided the country much more than it has been since segregation was a thing. I mean the KKK showed up to his rallies, and he started legit conversations of barring, deporting, and walling out people based on race.
This election was one, "Trump is Ivanka's babies daddy" away from being a Jerry Springer episode. We often say this or that candidate will ruin the presidency, Trump just flat out made it a joke. I look forward to 2020's election of Ben Afflek vs. Vince Mcmahon.