there are plenty of political groups on there, just don't expect to not get downvoted to oblivion in popular groups like r/politics if you are a conservative. That's just the way democracy works and I would guess 75-85% of reddit is far to moderate left on the political spectrum. I also think that like 60% of the users are from the US and Canada so it's definitely going to be US centric. Again there are groups for specific countries and topics there, just don't expect them to make it to the front page.