Digby: A Dime's Worth

The latest Rasmussen Reports election poll in the Keystone State shows Democrat Bob Casey leading Santorum 50% to 41%. That's the first time in all six polls we've conducted on this race that Casey's lead has slipped to single digits. It's also the first time Santorum has moved above the 40% mark since last July.

However, another aspect of the poll might be even more encouraging for Santorum... and troubling for Casey.