Since I have nothing better to do while I wait for ad-comm decisions, here goes another dumb question: if you're at one of the less formal interview weekend events, such as a departmental party or casual grad student gathering, would it be a bad idea to get into a discussion of politics if the conversation happens to be steered that way? I know people in academia are typically liberal (as am I), but is it bad taste to show your political bent during interview weekend?