Republican presidential candidate Rick Santorum on Thursday seized on what he called "pro-choice" comments by rival Herman Cain on CNN.
The accusation elicited a Twitter response from Cain who wrote, "I'm 100% pro-life. End of story."
During an interview Wednesday with CNN's Piers Morgan, Cain stated his pro-life stance, even in cases of rape or incest.
"I believe that life begins at conception. And abortion under no circumstances," Cain said.
But when Morgan asked how he would feel if a member of his family were raped and if he would want that family member to raise the child, Cain said it is "not the government's role or anybody else's role to make that decision."
"So what I'm saying is it ultimately gets down to a choice that that family or that mother has to make. Not me as president, not some politician, not a bureaucrat," Cain said. "It gets down to the family and whatever they decide, they decide. I shouldn't have to tell them what decision to make for such a sensitive issue."