Former President Trump on Tuesday said the United States' top military officer was guilty of treason if he went behind his back and promised to warn China of an impending attack. He was responding to bombshell revelations in a new book claiming that Gen. Mark Milley, chairman of the Joint Chiefs of Staff, twice called his Chinese counterpart last year over concerns that then President Trump was ready to go to war. 'If it is actually true - which is hard to believe that he would have called China, and done these things and was willing to advise them of...