WASHINGTON - By all indications, new Trump White House chief of staff, John Kelly, is not afraid to challenge his commander-in-chief.
 
The decorated retired Marine general who served three tours in Iraq was tapped by President Donald Trump to bring order to a chaotic West Wing.
 
Kelly began to make his mark Monday, dumping newly appointed communications director Anthony Scaramucci just days after his hiring, and restructuring a dysfunctional command structure that has bred warring factions.
 
From now on, all senior staffers - including the president's son-in-law Jared Kushner and chief strategist Steve Bannon - will report to Kelly instead of the president.
 
Some outside the White House say those and other changes are long overdue.