Larry Smar, the communications director for Senator Bob Casey (D-PA), told TPM in an e-mail that Casey has not attempted to get GOP Senator Arlen Specter to switch parties, after Dem Governor Ed Rendell said in an interview that Casey, Joe Biden and himself have all tried to talk Specter into it:

The Governor may have been referring to the green jobs event in Philadelphia last month when the Vice President, the Governor and Senators Casey and Specter were on stage together and there was some public joking about Specter changing Parties. Senator Casey has had no private conversations with Senator Specter about switching Parties.

Biden's press office has replied that they are not commenting on his private conversations with Specter, and Specter's office pointed RNN-TV, which did the Rendell interview, to previous comments in which Specter said he was prepared to run for re-election in 2010 as a Republican.