In 1997, the Senate voted 95-0 to restrict entry of the U.S. into future international climate treaties, ending hopes for legally binding emissions targets for the U.S.
Explore current and historical political parties, map party control, and learn about polarization.
The 42nd Congress voted 115-65 to establish Yellowstone, America's first national park -- despite concerns surrounding federalism
The Senate's attempt to repeal the Affordable Care Act narrowly failed due to a surprise defection by Sen. John McCain
The U.S. Senate unanimously voted to pass what would become the 26th Amendment, lowering the voting age to 18.
