II 116th CONGRESS 1st Session S. 200 IN THE SENATE OF THE UNITED STATES January 24, 2019 Mr. Markey (for himself, Mr. Murphy , Ms. Warren , Mr. Van Hollen , Mrs. Gillibrand , Mr. Merkley , Mr. Schatz , Mr. Leahy , Mr. Brown , Mr. Sanders , Mr. Wyden , and Ms. Smith ) introduced the following bill; which was read twice and referred to the Committee on Foreign Relations A BILL To prohibit the conduct of a first-use nuclear strike absent a declaration of war by Congress.