So what do we do if Trump wins? The odds are against it, but not that much against it. Not something we want to think about, but probably eaier to think about now than in the immediate miasma of despair.
There's some obvious answers: "Don't mourn, organize". Resist, build solidarity, seek to maintain compassion and hope.
But what specifically? What would be the best ways to stand by the people most vulnerable to Trump's attacks? What battles can be realistically fought with some hope of at least fending off some of the worst? What should the top priorities be?
(Of course many of these questions are still valid if Clinton wins, but the answers are probably very different).
What about for people outside the USA? A Trump Presidency would affect the whole world of course; questions of war and peace, climate change, etc. If the US pulls out of the Paris accords as Trump has promised, what can the rest of the world do, and what can its citizens do to push their governments?
I suspect that in the US the priority is probably simply resisting fascism, resisting the destruction of democracy, standing up for minorities and immigrants, against attacks on the press, activists, civil society, opposition politicians, even fighting to keep Hillary Clinton out of jail. Because if the battle against fascism is lost, so are all others until the wheel turns again.
This is still short on detail.
Meanwhile hoping to God that this question remains hypothetical.