Of course, the real poll will be when Republicans actually vote in PA, but Rasmussen, while not infallible, has a very good track record.
The very liberal PPP poll, imo, tried to get it right in the past to gain credibility, but have, and are, getting it wrong more recently, to sway the election for Romney.
I can remember when Zogby used to do that, and now Zogby is no longer the big deal it used to be.