Caine, a three-star general whom Trump has praised since at least 2019, helped lead an operation in Iraq against the Islamic State during Trump’s first term.

President Trump has picked retired Air Force Lt. Gen. Dan Caine to serve as the next chairman of the Joint Chiefs of Staff. NBC News' Courtney Kube has details on Trump and Caine's past and the possible complications of getting him confirmed to the position.

The general made an impression in 2018 when he said, according to the president, that the Islamic State could be defeated in a week.