Explore current and historical political parties, map party control, and learn about polarization.
The U.S. Senate unanimously voted to pass what would become the 26th Amendment, lowering the voting age to 18.
The Senate's attempt to repeal the Affordable Care Act narrowly failed due to a surprise defection by Sen. John McCain
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The Senate passed the Equal Rights Amendment 91-9, but an insufficient number of state legislatures subsequently ratified it.
