As with Title I vs Title II and other crap like this, this is just a symptom of a bigger problem: we have only two choices. Both times, YC got dragged into a situation where people demand they sever ties and punish people for their political views.
In our first-past-the-post system, even if Hitler and Mao were the nominees of the 2 parties, would the 3rd party get even 15% of the vote?
https://twitter.com/GregMozart/status/788448482264768512
I am very happy with YC's decision not to sever ties with people based on their support of a political position that a large (over 20%) portion of the population seems to have. The way that was done with Brendan Eich at Mozilla. There should be some separation between the workplace and a person's personal politics.
These people themselves are not killers, rapists, they do not exercise their own power to coerce others etc. They don't endorse every single bad thing their candidate does.
For the record, I think Trump is not very interested in learning about nuances, half the time it's not clear what he is really saying, almost never reconsiders his position, instead he just easily disavows his own statements, and that alone disqualifies him. But should I cut business ties with every Hillary supporter because I believe they are for brinksmanship and escalating the threat of a nuclear war with Russia? Many are. But that has such a small effect on the good we can do together, in the actual sphere of our collaboration. If I want to do something about the doomsday clock, cutting ties with my coworkers is very, very far down the list of effective things to do.
Even in your personal life, realize that arguing about politics is like arguing about astronomy -- the odds are overwhelming that you can't really change anything in the current election. So if your significant other likes a different baseball team, that's not nearly as important as shared values about how you're going to raise your children, or basic respect to human beings, or other things in your real life.
I don't live in California, and I know New York State (where I live) will vote Democratic as it always has, same as Cali. But we embrace political diversity much more than California, it seems. It may be more OK to publicly disinvite Douglas Crockford from a conference for his own personal behavior (I personally think it is ridiculous, but still), than to disinvite someone for mainstream political views or support for another candidate.
But as I said, this is all a symptom of our first-past-the-post system:
https://www.youtube.com/watch?v=s7tWHJfhiyo