WASHINGTON — Donald Trump named Republican National Committee Chairman Reince Priebus his White House chief of staff, elevating one of his loyal GOP advisers with a deep expertise of the Washington establishment Trump has vowed to shake up. Priebus, a close ally of House Speaker Paul Ryan, called the appointment “an honor” and predicted the billionaire “will be a great president for all Americans.” Trump also named Stephen Bannon, his campaign CEO and executive on leave from conservative website Breitbart, to be the president-elect’s chief strategist and senior counsel. With Vice President-elect Mike Pence as transition chief, the trio was expected to organize the incoming administration, according to a statement from the Trump camp. There was much to steady.