I thought Mark Milley was appointed/confirmed as the Joint Chiefs of Staff chair under President Trump?
He was.
Your point?
He was.....
“General Mark A. Milley is the 20th Chairman of the Joint Chiefs of Staff, the nation’s highest-ranking military officer, and the principal military advisor to the President, Secretary of Defense, and National Security Council.
Prior to becoming Chairman on October 1, 2019, General Milley served as the 39th Chief of Staff of the U.S. Army.”
https://www.defense.gov/Our-Story/Biographies/Biography/article/614392/general-mark-a-milley/
But he’s a political animal and wants to keep his job so will go along with whatever this administration wants which is despicable and will be the downfall of the military.