19h 14min, may 22, 1978 y - Washington D.C. becomes the U.S. capital
Description:
Walter Washington became the first elected mayor of Washington, D.C. ... In 1978, Congress sent the District of Columbia Voting Rights Amendment to the states for ratification. This amendment would have granted the District representation in the House, Senate, and Electoral College as if it were a state.
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Federalist Era Timeline
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