By Alicia M. Cohn - 02/24/12 03:32 PM EST
“That is flatly not true,” he said on MSNBC. “We never had any such conversation. It would be improper to make a commitment on the vote before I knew who the nominee was and I knew whether the nominee was qualified.”
Specter campaigned for Santorum in 1994 and 2006. Santorum reciprocated for Specter in 1996 and 2004. Specter switched party affiliation in 2010 from Republican to Democrat.
To read more on Specter's comments, click here.