I live and work in a midwestern suburb in the US (a moderate but liberal area). I am a developer but I don't work in anything politics related.
In my spare time, I like to use elections and legislative data (US) to do small analytics projects. I often create maps, charts, etc. and publish them on GitHub and sometimes Twitter (I only use my Twitter to retweet data science related tweets to start with; I'm not a very avid Twitter user).
Usually, I get about 5-10 likes/retweets. Sometimes, I get up to 50-75 likes/retweets. If that happens, I get a few new followers on Twitter, and I also gain a couple GitHub followers so assume some Twitter users also click through to my GitHub and follow me there.
So far, I've had very few but positive interactions with my followers, and I don't think that will change - so it's not a problem. (i.e. my followers are not themselves a problem)
Also note that these are people who chose to follow me - I'm not following them.
I have noticed that virtually ALL of my followers on GitHub and Twitter are at least liberal-leaning or even call themselves Democrats. While I have definitely become a lot more liberal in the last 4 or 5 years, I am still pretty conservative, and don't consider myself a Democrat.
I am concerned that a current or future employer could notice that most of my followers are liberals and form the conclusion that I am also a liberal. As I work in conservative industries, I could see this negatively impacting my future job prospects.
I don't think it's a huge concern as I am a small-time Twitter user and while I do use GitHub a lot, I'm not famous by any means, so the odds that an employer would check my followers is very low - but it's still possible.
How realistic is my concern that a current or future employer could check my Twitter and GitHub followers?