If verifying political claims is your goal, both PolitiFact and FactCheck are invaluable resources. I especially like PolitiFact for its quick Truth-O-Meter ratings. Both parties tend to champion the sites when it supports them or attack them as biased when it doesn't—in other words, politics as usual. I won't claim that these sources are "true neutral," as that's difficult if not impossible to come by, but if they have a secret plot to further one side over the other, they've done a great job hiding it. Unfortunately, the sites are far from comprehensive. Apparently thorough, balanced reporting actually takes some time and effort—who knew?
As far as political discussion forums go... well, there's a subreddit for everything these days. I generally steer clear of the hard-left sensationalism of r/politics, in favor of smaller and more thought-provoking places like r/2012elections, r/PoliticalDiscussion, r/ModeratePolitics and r/NeutralPolitics. The first is highly topical, while the second is an open space for talking about every political idea under the sun. Even if you're not a moderate, chances are you'll still enjoy the latter two, as the focus is on civil discussion instead of creating an echo chamber. I like to view these four in unison as a single multireddit.