days of the trump administration. cnn s brian todd has the details. reporter: president biden backing joint chiefs chairman army general mark milley. i have confidence in general milley. reporter: following new revolutions in the new book peril. former president trump and some republicans in congress calling for milley to be tossed out even court martialed over the courting in the book that general milley was so fearful that president trump would start a war with china that he secretly called his chinese counterpart twice to reassure him that the united states would not strike china. that is treason. i ve had so many calls today saying that is treason. reporter: general milley s office defends his calls saying they were part of a series of calls with mirkamerica s alleys adversaries. a defense official says that the calls were not done in secret and followed the same protocols used by other chir air men of t