ALL issues can be polarized politically.
This will encourage other folks to get involved in the discussion.
You don't even HAVE to have a well constructed opinion on an issue, article, or event........you can simple apply some political terms and then you can show everyone what you're made of!
For example......you could post an article describing some notable current event.
Instead of actually discussing how the event makes you feel, you could simply say something like, "I wonder how all the libs feel about THIS?".....or "This has GOT to embarrassing for the conservatives".
It doesn't matter that no political demographic has identified with the issue (or otherwise)......what's important is that YOU know exactly how everyone in the world feels about everything.