I feel I may have misspoken about Donald Trump in our Dept. Should I risk drawing attention to the issue by apologizing for it? Some administrators and professors and I were talking about all the recent events going on, and I feel I may have participated a bit much in the dialogue and now feel I may have gotten on some people's bad side.  If I email one or more of these profs. / admins, I risk drawing attention to a non-issue - there's no proof that any of them were even bothered by the dialogue, yet I feel uneasy about the current events being discussed so openly inside of a school building.

What do you recommend that I do?  Be proactive and send an email and apologize in the event that I may have misspoken about something -- or keep my mouth shut and don't draw any more attention to that conversation?
They say three topics are banned from polite after-dinner conversation: religion, politics and sport. There are good reasons for that.

It can be said that the same holds for workplace. Academia is, in this sense, a slightly different animal in that at times it is a place where people vigorously express their opinion, and proudly so. This does not prevent occasional ganging-ups of opinion groups against people which are not seen to conform to the currently prevalent sentiment or simple are considered an out group. 

Unless you must fear that the latter is the case (and with highly professional people, such as senior academic staff, I would start from the assumption that the threshold is relatively high for that), consider what's done is done. Let it go. 

Remember Churchill's dictum: a fanatic is someone who won't change his opinion and can't change the topic.