II 116th CONGRESS 1st Session S. 604 IN THE SENATE OF THE UNITED STATES February 28, 2019 Mr. Thune (for himself, Mr. Brown , Ms. Baldwin , Mr. Barrasso , Mr. Blumenthal , Mr. Booker , Ms. Cantwell , Ms. Collins , Ms. Cortez Masto , Mr. Crapo , Mr. Cruz , Ms. Ernst , Ms. Hassan , Mr. Hoeven , Mr. Isakson , Mr. King , Ms. Klobuchar , Mr. Leahy , Mrs. Murray , Mr. Portman , Mr. Reed , Mr. Schatz , Mrs. Shaheen , Mr. Tillis , Mr. Toomey , Mr. Van Hollen , Mr. Whitehouse , Mr. Wicker , Mrs. Hyde-Smith , Mr. Murphy , Mr. Peters , Mr. Risch , and Mr. Lee ) introduced the following bill; which was read twice and referred to the Committee on Finance A BILL To limit the authority of States to tax certain income of employees for employment duties performed in other States.