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.”

Another senior administration official said that Hagel has been discussing a departure from the White House “for several weeks.”

“Over the past two years, Secretary Hagel helped manage an intense period of transition for the United States Armed Forces, including the drawdown in Afghanistan, the need to prepare our forces for future missions, and tough fiscal choices to keep our military strong and ready,” the official said. “Over nearly two years, Secretary Hagel has…