In a chaotic CBS debate in South Carolina, candidates of all stripes attacked Vermont Senator Bernie Sanders as he continues to pull away from the pack. He faced questions about his praise for educational advancements in Cuba under the Castro regime and the cost of his domestic policy proposals.Former New York City Mike Bloomberg once again faced criticism for his comments toward women. Massachusetts Senator Elizabeth Warren accused him of telling an employee to terminate her pregnancy, which Bloomberg denies.This episode: White House correspondent Tamara Keith, demographics and culture correspondent Juana Summers, and national political correspondent Mara Liasson.