Sen. Warren rips Federal Reserve chair pick Kevin Warsh: 'You have learned nothing from your failures'

What: Sen. Warren has publicly criticized Kevin Warsh's nomination for Federal Reserve chair, citing his past failures.
Why: Warsh's nomination is in limbo due to a criminal investigation of current Fed Chair Jerome Powell.
Signal: Warsh's past failures and current controversy may harm his chances of becoming Fed chair.
Target: Warsh's nomination faces significant opposition from lawmakers like Sen. Warren.
Risk: A prolonged nomination process could impact the Fed's ability to make timely monetary policy decisions.