To add to what nwr says, I would suggest (provided PM is your brainchild, Percy) making PM a direct corollary to EvC. Basically, make it a seamless transition from one site to the other for political discussion. I, for one, post in political topics here and not elsewhere because of the level of expected discourse given the nature of EvC. I see this site as somewhere where "adult" conversation is, for the most part, expected. Yes, I am a very bad example of this with my propensity for profane language and the fact that I am nowhere near as edumacated as most of you, but it is a level I strive for. Conversely, the few times I visited PM, it felt disjointed. It didn't feel as though there would be any semblance of valid discourse.
That's just my 2 pesos, take it with a grain of salt.
Put the FSM back in Chrifsmas