At his Senate confirmation hearing, Warsh insisted that he would "absolutely not" be a puppet for the US president Donald Trump.

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?

Warsh is replacing Jerome Powell as head of the central bank after the Senate confirmed the Trump appointee in a 54-45 vote last week.