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Daily Challenge
5 questions · same set for everyone today
27
Amendments
7
Articles
1789
In force
202
Years span

Amendments by era

The 27 amendments cluster into a few distinct waves, each driven by a different political moment.

Original Constitution vs. Bill of Rights

Amendment ratification simulator (Article V)

Walk an amendment through the only path the Constitution allows. Both the proposal and the ratification need supermajorities — that is why amendments are rare.

Ratification math — congressional path

Which amendments were active on…?