For good-natured and mutually-respectful discussions of politics and current affairs. Soap-boxing and the promotion of extremist causes motivated by hate will not be tolerated by our moderators.
At least for me, American politics is more about statistics and following story lines than ideology. I'm used to the ideological bantering and posturing among friends and family over the years. I was a small part of it when I had direct access to Congressional staff--and even helped write some speeches. At that level, it's pretty cut and dried.
I do get emotionally involved in social issues related to Science policy--so, I try to resist posting directly on those issues. Still, I'm a sucker for discussions of Global Warming.
I think, overall, that it's best to stay on the ascending side of responses for one's emotional health--even if the professional trollers always win.