President Trump “enters a new phase of his presidency on Monday with a new chief of staff but an old set of challenges as he seeks to get back on course after enduring one of the worst weeks that any modern occupant of the Oval Office has experienced in his inaugural year in power,” the New York Times reports. “The shake-up followed a week that saw the bombastic, with-me-or-against-me president defied as never before by Washington and its institutions, including Republicans in Congress, his own attorney general, the uniformed military leadership, police officers and even the Boy Scouts.