II 115th CONGRESS 2d Session S. 2643 IN THE SENATE OF THE UNITED STATES April 10, 2018 Mr. Markey (for himself, Mr. Whitehouse , Mr. Van Hollen , Ms. Smith , Mr. Blumenthal , Mr. Merkley , and Mr. Bennet ) introduced the following bill; which was read twice and referred to the Committee on Environment and Public Works A BILL To clarify the effect of certain final rules and determinations of the Environmental Protection Agency relating to greenhouse gas emissions standards for light-duty vehicles.