WASHINGTON, DC – Today, U.S. Senator Mazie K. Hirono (D-HI) joined Senators Elizabeth Warren (D-MA), Tom Carper (D-DE), and U.S. Representatives Don Beyer (D-VA), Katie Porter (D-CA), Brad Sherman (D-CA), and over 130 colleagues in sending a letter to U.S. Secretary of the Treasury Janet Yellen and Internal Revenue Service (IRS) Commissioner Daniel...