That is not a good site for politics, unless you like the echo chamber. r/politics is dominated by one group, another group has their own subreddit etc.
The problem with /r/politics is that it's thoroughly dominated by left wing / socialist types. If you show up there and try to have a reasoned debate that promotes a libertarian ideal, for example, you get shouted down and/or down-voted into oblivion. By and large, the members there only want to talk to people who already share their own beliefs, they're not really interested in being challenged, in debate, or in rational discourse.