Defense Sec. Chuck Hagel is expected to step down Monday. AP photo
BY JIM MIKLASZEWSKI, NBC News
(NBC News) - Defense Secretary Chuck Hagel is stepping down amid criticism of the president's national security team on a series of global issues, including the threat posed by the militant group known as ISIS.
Senior defense officials confirmed to NBC News Monday that Hagel was forced to resign.
The officials say the White House has lost confidence in Hagel to carry out his role at the Pentagon. According to one senior official, “He wasn't up to the job.”
President Barack Obama is expected to make the announcement at the White House at 11:10AM ET.
Hagel, the only Republican on the president's national security team and the first enlisted combat veteran to lead the Department of Defense, has served in the job since February 2013.