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?

Trump will host Kevin Warsh’s swearing-in as Federal Reserve chair as he replaces Jerome Powell during a volatile phase for the US economy.

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?

Kevin Warsh has taken the oath as the new US Federal Reserve chair. President Donald Trump stated his desire for Warsh to be fully independent. Trump urged the new chair to focus…