2. Jerome Powell, above, President Trump’s nominee to head the Federal Reserve — arguably the second most powerful post in government — is seen as a centrist and pragmatist who will stay Janet Yellen’s course on monetary policy. He was nominated by President Obama to the Fed’s board of governors in 2012.

As Mr. Powell’s star rises, a very different power broker is taking a step back.

Robert Mercer, a billionaire investor and conservative lightning rod, said he was selling his stake in Breitbart — which the former Trump strategist Stephen Bannon has resumed running — to his daughters “for personal reasons.” And he is retreating from the helm to the research arm of his $50 billion hedge fund, Renaissance Technologies.

_____