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Article 4 of the U.S. Constitution

Sep 16, 2025

Overview

This lecture explains Article 4 of the U.S. Constitution, which structures the relationships and responsibilities between states and the federal government to create a unified nation.

Purpose of Article 4

  • Article 4 establishes the practical framework for federalism, balancing power between states and the federal government.
  • The framers wanted a strong central government while preserving the importance and autonomy of the states.
  • Checks and balances operate not only between government branches (horizontal) but also between state and federal governments (vertical).
  • States are intended to act collectively for national interests like trade and defense, avoiding harmful individualism.

Section 1: Full Faith and Credit Clause

  • Requires each state to recognize and respect public acts, records, and judicial proceedings of other states.
  • Court judgments, marriages, and legal decisions valid in one state must be honored in every other state.
  • Prevents chaos that would result if states refused to acknowledge each other's legal decisions.

Section 2: Privileges and Immunities Clause and Fugitive Slave Clause

  • Guarantees citizens of each state the same privileges and immunities as citizens in every other state (e.g., right to travel, equal treatment).
  • States cannot restrict the rights of citizens from other states or discriminate against them.
  • The Fugitive Slave Clause required that escaped slaves be returned to their owners; this was a compromise with slavery in the original Constitution.

Section 3: Admission of New States

  • Provides the process for admitting new states, with Congress having the authority to approve new entries.
  • New states cannot be formed from existing states or by merging states without consent from the involved states.
  • Uncertainties existed regarding acquiring foreign territories (e.g., Louisiana Purchase), but Congress approved such actions.

Section 4: Guarantee Clause

  • The federal government guarantees each state a republican (representative) form of government.
  • The U.S. must protect states against invasion and domestic violence.
  • States cannot adopt non-republican forms of government, even by popular vote or constitutional amendment.

Key Terms & Definitions

  • Federalism — shared governance between state governments and the federal government.
  • Full Faith and Credit Clause — requires states to honor the public acts and judicial rulings of other states.
  • Privileges and Immunities Clause — ensures citizens receive equal treatment in all states.
  • Fugitive Slave Clause — mandated return of escaped slaves to their owners (now obsolete).
  • Republican Form of Government — representative government based on majority rule.

Action Items / Next Steps

  • Review Article 4 in the U.S. Constitution.
  • Explore additional resources at the National Constitution Center and Khan Academy on U.S. government and politics.