McCain: Holder has ‘no credibility’ – Sen. John McCain doubled down on calls for a special prosecutor after Attorney General Eric Holder appointed two federal prosecutors to oversee investigations into leaks of classified information.  “Mr. Holder’s credibility with Congress – there is none,” the Arizona Republican said Sunday on CNN’s “State of the Union.” “We continue to have this problem with him withholding information on Fast & Furious, which resulted in the killing of a border patrol agent in Arizona. He is close to being held in contempt.”