The 42nd Congress voted 115-65 to establish Yellowstone, America's first national park -- despite concerns surrounding federalism
Joseph Rainey (R-SC), born into slavery, was the first African-American elected to the House of Representatives.
The House impeached President Donald J. Trump for a second time, an unprecedented feat in U.S. history, on charges of fomenting insurrection
Map, visualize, and explore the passage of the USA PATRIOT Act in October 2001
The U.S. Senate unanimously voted to pass what would become the 26th Amendment, lowering the voting age to 18.