Kevin Warsh was sworn in as Federal Reserve chair at a White House ceremony, with Trump urging independence. He inherits 3.8% inflation and tough rate decisions.

Never before has a chair of the US Federal Reserve been so controversial. Who is Kevin Warsh? Can he preserve the Fed's independence, or will he become Donald Trump's puppet?

Never before has a chair of the US Federal Reserve been so controversial. Who is Kevin Warsh? Can he preserve the Fed's independence, or will he become Donald Trump's puppet?