In one of the more heated moments of the Republican presidential debate in Orlando, Fla., last week, several of the candidates took turns criticizing Texas Gov. Rick Perry for giving undocumented immigrants college tuition breaks. "If you say that we should not educate children that have come into our state for no other reason that they've been brought there by no fault of their own, I don't think you have a heart," he said, defending the bill he signed in 2001 that allows undocumented students who've graduated from a Texas high school and who have lived there for three years...