II 115th CONGRESS 2d Session S. 2603 IN THE SENATE OF THE UNITED STATES March 22, 2018 Mr. Blumenthal (for himself, Ms. Warren , and Ms. Baldwin ) introduced the following bill; which was read twice and referred to the Committee on Finance A BILL To amend the Internal Revenue Code of 1986 to allow a credit against income tax for qualified conservation contributions which include National Scenic Trails.