Abstract
repeal and amend substantive statutes unilaterally, a power that can threaten bedrock commitments to our federalism and to our constitutional rights to the jury. The decisions about how and when to displace state law in favor of federal law and about how and when to grant powers to juries over judges cannot be vested in the Judicial Branch alone without the structural restraints of an Article III “case or controversy.” The paper concludes by offering some ways to fix our evidence law and to put it on firmer footing, permitting better power-sharing and dialogue between two branches of government—Congress and the Supreme Court—that both have reasonable claims to some authority in the area.