NEW: "Stephen Miller will be the new chief of staff, and Susie is going to go over to the political operation." President Trump offers a simple answer when ask

NEW: "Stephen Miller will be the new chief of staff, and Susie is going to go over to the political operation." President Trump offers a simple answer when asked what he wants Miller to do differently from Wiles: "Just run things well." Download the Fox News app to follow this developing story: <…