Sen. Bernie Sanders (I-Vt.) on Sunday again called on former Vice President Joe Biden to apologize for touting his relationships with segregationists, saying Biden’s former colleagues participated in a “disgusting system.” “It is one thing to work with people you have fundamental disagreements with, it’s another to kind of extol those relationships,” Sanders said on CBS’ “Face the Nation” Sunday. “You cannot be extolling people who really were part of a disgusting system.” “I think Joe owes the country an apology on that,” Sanders said, adding “Do I think Joe Biden is a racist? Absolutely not.” Biden sparked controversy last...