From Yahoo
Worried over what Trump might do,
Milley warned military officials to follow procedures to the letter in carrying out any orders, including involving him in the process. Military officers gave Milley their word, in what he considered to be an "oath," the book says.
"You never know what a president's trigger point is," Milley had told his senior staff at the time, according to the book.
These reports suggest that Milley may have over-stepped his role as the chairman of the Joint Chiefs of Staff, a role that advises the president and defense secretary but is not part of the chain of command for operational decisions like the launching of nuclear weapons.
Milley was so concerned that Trump might start a war with China, he privately called his Chinese counterpart twice to assure him that the US would not strike, per the book.
Milley had also grown anxious that Trump would take military action against Iran and warned him not to,
according to another forthcoming book by the New Yorker's Susan Glasser and New York Times' Peter Baker, slated to come out next year.
Go ahead and investigate. The only thing this proves is trump is nuts.