New US Federal Reserve Chair Kevin Warsh vowed to be “reform-oriented” as he was sworn in at the White House on Friday, with President Donald Trump insisting the central bank chief would be “totally independent.”

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?