Milley tweeted that the Army "doesn't tolerate racism, extremism, or hatred in our ranks", seemingly a rebuke of Mr. Trump's comments. While serving as head of U.S. Army Forces Command at Fort Bragg, North Carolina, Milley was assigned to review the case of former Army Sgt. Bowe Bergdahl, who abandoned his post in Afghanistan and was held captive by the Taliban for five years. Trump re-nominated him in 2017 for a second term.
"I have another one for tomorrow that I'm going to be announcing at the Army-Navy game", Trump said, according to a White House pool report.
The chairman is the highest-ranking officer in the USA military and is the top military adviser to the president.
Gen. Joseph Dunford, the chairman of the Joint Chiefs of Staff, will be done his second term in 2018.
In his more than 35 years in the military, Milley has commanded units with the 10th Mountain Division and the 101st Airborne and served multiple combat tours in Iraq and Afghanistan.
Previous chairmen served two two-year terms if they were re-nominated.
Trump hinted earlier Friday that he would be making an announcement on Saturday, when he attends the game and is expected to perform the coin toss to decide which team gets the ball first. Nonetheless, such wars would require front-line fighting, he has said.
In recent years, Milley has been on the forefront of change for the Army.
"He's a battle-tested commander and Pentagon reformer who will be a worthy successor to General Dunford", said Graham, who sits on the Armed Services Committee. The service so far has built two of six planned brigades. The positions of vice chairman, Army chief of staff now held by Milley, chief of naval operations and the Marine Corps' commandant are all due to be replaced by Trump in 2019.
"I can give you a little hint: It will have to do with the Joint Chiefs of Staff and succession", Trump told reporters at the White House before his departure for Kansas City.