I think even a link to that type of forum could get you censured here.
I will, however, give you a link to a game. It is a government simulation and politically neutral. They have an affiliated forum collection which does include a 'free topic' area.
The Fray over at Slate is full of the worst sort of vitriol, bile and unsupported arguments I've ever seen. There are rare posts there that are well thought out and nicely written, but you generally have to dig through a lot of crap to find those gems (sticking to star posts helps).
Forum rule #4: The discussion of politics and religion on this forum, except in relation to how they are portrayed in movies is not allowed on this forum.
Are you sure? One would think, since politics isn't discussed here at HTF, that the admins/mods would be happy for members to provide links to take that type of discussion somewhere else.