Politico has his own thread because many posters, including Politico himself, requested it. Without it, his threads tended to clog up the front page here. And it's not a quarantine zone or whatever, it's basically a miniblog just for him. Everyone still reads it.
I'll let this thread stand because it kinda raises a nominally different point (I mean, imagine Ron Paul debating Obama, trololo) but also for the sake that it would make the last couple of pages in the megathread way too confusing to read. In the future, Politico, please use your thread for it's intended purpose.