Bolton, who visited President Donald Trump in the Oval Office earlier this month and has reportedly been considered as a replacement for national security adviser H.R. If you want to get a sense of just how the next national security adviser, John Bolton, fits into Washington's foreign policy ecosystem, consider his lobbying last year against the Iran nuclear deal. Trump tweets that McMaster has done “an outstanding job & will always remain my friend.” He says Bolton will take over April 9. The speculation prompted chief of staff John Kelly to address White House staffers this month and offer a reassurance that more upheaval was not on its way for officials, White House press secretary Sarah Huckabee Sanders told reporters last Friday. A White House official said Bolton is one of the strongest voices and experts on the full range of national security issues and challenges facing the U.S.

McMaster’s retirement comes just one week after the president fired Secretary of State Rex Tillerson on Twitter, and after other high profile administration departures.
U.S. President Donald Trump announces former United States Ambassador to the United Nations John R. Bolton will become his National Security Advisor, succeeding the outgoing H. R. McMaster.