Scholars have long debated Congress\u27s power to curb federal jurisdiction and have consistently assumed that the constitutional limits on Congress\u27s authority if any must be judicially enforceable and found in the text and structure of Article III In this Article I challenge that fundamental assumption I argue that the primary constitutional protection for the federal judiciary lies instead in the bicameralism and presentment requirements of Article I These Article I lawmaking procedures give competing political factions even political minorities considerable power to veto legislation Drawing on recent social science and legal scholarship I argue that political factions are particularly likely to use their structural veto to block ...