Congressional deadlock means federal agencies and the U.S. Supreme Court will play prominent roles in shaping the nation’s business environment next year.

New rules from the U.S. Envi­ronmental Protection Agency will prompt litigation, and the Supreme Court’s review of greenhouse-gas regulations could significantly alter the shape and scope of the agency’s authority, according to leading regulatory law attorneys and current and former members of Congress who spoke during The National Law Journal Regulatory Summit on Nov. 13.