Republican presidential candidate Sen. Rick Santorum launched a new front for GOP attacks on Gov. Rick Perry’s immigration record during Thursday’s debate in Orlando, Fla., charging the Texas governor with supporting a plan for bi-national health insurance with Mexico. “I would say that he is soft on illegal immigration,” Santorum began. “[He] gave a speech in 2001 where he talked about bi-national health insurance between Mexico and Texas. I mean, I don’t even think Barack Obama would be for bi-national health insurance.” Santorum’s comment was part of a larger hit on Perry’s immigration record, in which he cited the governor’s...