How do I survive academia as a Trump supporter? Academia is highly liberal - which is fine. I don't mind liberals in general. However I voted for Trump. 

I had a weird experience recently. I was chatting with some people at a conference at dinner and one older, well established, professor started talking about Trump supporters. He talked about how awful Trump supporters are and started naming names. He said that such and such person at such and such university was a Trump supporter. As a Trump supporter this made me nervous. I try to hide my support for Trump but of course some people know.

Given that there are a lot of people who think Trump supporters are evil, and given that people have no problem naming names, and given that people know I support Trump, how do I best control the damage? Should I "repent" so to speak? Should I just keep my mouth shut and hope for the best?
I have political views, too, but I learned not to communicate them too much.
No matter what is your view and what you vote for or believe in, there will always be someone having a different opinion. Now we might of course think that in an academic environment, such opinions can be calmly and objectively discussed, but that is often not the case.
There are, in my eyes, two ways to deal with it:

1) You voice your opinion and stand behind it, support it with arguments and stand your point; all the while respecting other view points and staying calm of course.
2) You keep quiet about your views and if you get stuck in a political discussion, you try to take the position of a neutral, outside observer, discussing the current politics like you would discuss the pro and cons of political choices in history.

The first option will make it easy to make friends, but will also make you enemies. The second option is harder, as you have to cover your opinion, but it makes it easier to get along with everyone, as you don't openly oppose their believes.

I personally chose the second option for myself and it is really interesting to look at current political developments like a historian would do; seeing how both sides influence the people and witnessing so many fail to see things critically (even, as in your case, highly educated people).

It is up to you how you deal with these things, but you should be aware that both speaking up and staying quiet has its pros and cons.

PS: These two choices do not only apply to "Trump vs. Clinton", but to almost every topic where people have different opinions and where the "others" are evil for believing "the wrong thing"...