Susan Glasser: “He knows how White Houses run when they work and how they fail when they don’t—and, just as importantly, what government is actually supposed to do. Klain, who ran the Senate Judiciary Committee for Biden when Biden chaired it decades ago, worked under nine chiefs of staff during the Clinton and Obama Presidencies, and twice served as Vice-Presidential chief of staff, first for Al Gore, in the late nineties, and then for Biden, from 2009 to 2011. He is, he tells people, the White House chief of staff who has worked for more chiefs of staff than any other.”

