Former military members referred to the secretary of defense as "a blowhard," "a complete jackass" and "a total blue falcon."

Kelly, a retired U.S. Navy captain, also has the standing to go to federal court if he is recalled to active duty to then be court martialed, said Rachel VanLandingham, a professor at Southwestern Law School and former Air Force lawyer.

Ariz., responded to the Pentagon's announcement that it will be investigating him over a video where he urged service members to “refuse illegal orders."

The Dept. of War's investigation of Mark Kelly raises questions about the free speech rights of a sitting U.S. senator and retired Navy captain.

President Donald Trump has accused the Arizona Democrat of "seditious behavior" that is "punishable by death."

GOP Rep. Don Bacon of Nebraska called the Administration’s threats against Democrats, including a potential court martial of Sen. Mark Kelly, “crazy.”

The War Department said it will probe Sen. Mark Kelly after he participated in a video reminding members of the military to refuse unlawful orders.