This is the text on the no politics rule:
If you want to state your opinion and have a debate about a controversial or political topic like types of government or gun laws, do it in another stream. It is OK to reference things that have to do with politics in the Fun stream, but only if it has nothing to do with political debate and could be fun for anyone who sees it. For example, making the joke that "congress" is the opposite of "progress" is OK because it's poking fun at governments in general rather than trying to debate a political point.