Wells Fargo Chief Executive Officer John Stumpf testifies on Capitol Hill in Washington, Tuesday, Sept. 20, 2016, before Senate Banking Committee. Stumpf was called before the committee for betraying customers' trust in a scandal over allegations that employees opened millions of unauthorized accounts to meet aggressive sales targets. (AP Photo/Susan Walsh)
** FILE ** In this March 7, 2013, file photo, Sen. Elizabeth Warren, D-Mass., pauses while questioning a witness at Senate Banking Committee hearing on anti-money laundering on Capitol Hill in Washington. (AP Photo/Cliff Owen, File)
Janet Yellen, of California, President Barack Obama's nominee to become Federal Reserve Board chair, testifies on Capitol Hill in Washington, Thursday Nov. 14, 2013, before the Senate Banking Committee hearing on her nomination to succeed Ben Bernanke. (AP Photo/Jacquelyn Martin)