Publishing in 'leftist' journals or book projects: Impact on career?
There is nothing wrong with communicating your research to (a part of) the general public. In all likelihood public funding was used to pay for part of your research or used in your university, so it is only fair to give something back when you can. I would not hide it either, that only looks suspicious. Instead I would just add a section to your CV for communications with the general public. It would often be viewed as positive, though other things like publications would be valued much higher. Who knows, maybe you will end up in a very close race some day and that little extra is just enough. 

If those pulbications have nothing to do with your research than those are just your private actions as a citizen. You don't need to mention those in your CV, but I don't think they will be held against you.