Pennsylvania: Senator Rick Santorum (R) now trails 50% to 37% in the latest Rasmussen Reports survey. When leaners are added in, Bob Casey, Jr. (D) is ahead 52%to 39%. Data and Article Coming Later. Over the summer, Santorum was gaining ground, but his momentum has stopped. He had closed the gap to eight points by late summer, but trailed by ten in our last poll. When this data is released to the public, we will shift our ranking of the race from "Leans Democrat" to "Democrat" in our Senate Balance of Power summary. This once again confirms Santorum's status as the nation's most vulnerable incumbent. No Democratic incumbents are trailing at this time and no other campaign involving a Republican incumbent is rated weaker than "Leans Democrat."
Link? This is great news, but I'd rather have a source so I can more easily believe it.