On Friday’s broadcast of Laura Ingraham’s radio show, Rick Santorum defended his claim that his endorsement of moderate Sen. Arlen Specter in 2004 stemmed from a conversation the two had about supporting President Bush’s Supreme Court nominees.

Specter had appeared on MSNBC earlier in the day and denied that he and Santorum had discussed Bush’s nominees prior to the 2004 election.

“We never had any such conversation,” Specter told the network’s Chuck Todd. “It would be improper to make a commitment on a vote before I knew who the nominee was and whether I thought the nominee was qualified. I’ve got a very strong reputation and a record behind that did not make deals like that.”

Santorum, however, told Ingraham that wasn’t the case and cited the confirmations of Supreme Court Chief Justice John Roberts and Associate Justice Samuel Alito as proof.