President Donald Trump says he has fired Defense Secretary Mark Esper. It's a stunning move on the heels of Trump’s failed reelection bid. It could also unsettle U.S. allies and partners.

Former Defense Secretary Mark Esper refused to carry out such an order during the first Trump administration during the unrest following the 2020 killing of George Floyd by Minnesota police ...

Jim Mattis. Likewise, the Senate voted in 2019 by a 90–8 margin to confirm Trump’s second secretary of defense, Mark Esper. Hegseth first came under fire as sexual assault allegations emerged ...

Defense Secretary Pete Hegseth faces increasing scrutiny after sensitive military plans were shared in a private chat. Former ...

Nancy A. Youssef is a national security correspondent whose reporting has focused largely on the U.S. military and the Arab world.