The U.S. Senate unanimously voted to pass what would become the 26th Amendment, lowering the voting age to 18.
The House impeached President Donald J. Trump for a second time, an unprecedented feat in U.S. history, on charges of fomenting insurrection
The Senate passed the Equal Rights Amendment 91-9, but an insufficient number of state legislatures subsequently ratified it.
The 42nd Congress voted 115-65 to establish Yellowstone, America's first national park -- despite concerns surrounding federalism
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