I am right now in the middle of knitting an Asexual flag scarf ,and a rainbow scarf. I'm not even closed to finished with either one of them, although I'm very happy with the results, so far. I normally do not display flags, logos, etc. but for those who know, the colors will mean something.
I work in a Library so most of the people here are quite liberal. Its extremely rare to meet a Librarian who is a trump supporter (like meeting a unicorn, I would imagine) and we are generally discouraged from big displays of liberalism. We tend to be a bit more subtle with things like book displays or discreet pins and stuff.