President Donald Trump’s first term in office was marked by the cyclonic speed with which his White House’s revolving door spun for aides both incoming and outgoing. During his second term, Trump’s penchant for abrupt staffing changes has continued — if not apace, then at least with the same mercurial fickleness that characterized many of his first-term firings. Here’s who has already been shown the exit, shuffled into a new role or been given l…