Thanks for all your feedback! My current job is in the private sector (IT), and I don't care whatsoever if they know about my participation in Saturday's march. My concern is more around potential employers. The organization I interviewed with yesterday is public. I'm not sure how they feel about their employees visibly supporting a particular political position. If they were to see news footage of me at the march and take issue with it, I doubt they're going to tell me. I'm just not going to get the job. Thankfully, since I am currently employed, no one will starve without my paycheck, but I am very motivated to find a new employer due to a toxic situation in my workplace. And, in a relatively small market, well-paying IT jobs at my experience level are few and far between. Just trying not to inadvertently torpedo my chances...
Ultimately, I agree that I probably don't want to work for a company or manager who would take issue with my participation, so I am planning on going tomorrow. I think I will just do my best to stay under the radar.