This episode examines the U.S. Constitution's Origination Clause, which mandates that all revenue bills originate in the House of Representatives. We analyzes the Clause's interpretation and enforcement by the House, Senate, and Supreme Court, highlighting differing approaches to defining "revenue bills." We explores precedents established through congressional practices like "blue-slipping" and Supreme Court rulings, focusing on key distinctions between revenue and non-revenue measures. We also addresses the Clause's application to appropriations and public debt legislation, revealing areas of ongoing debate and contrasting interpretations.