We do have fairly used tags for propaganda and rhetoric but these are somewhat loaded terms (especially the former). I'm not sure these tags are enough to cover all aspects of political communication. There's no tag for political adverts that I can find, for example (perhaps the media tag was deemed to cover those, although its description says nothing about adverts).
So, should we have a more generic tag like "communication", borrowed from the academic discipline? Or can someone suggest a better generic term, if one is indeed needed?