Before she became Vice President, Kamala Harris was the first South Asian-American woman elected to the Senate
In 1866, the House voted 105-20 to try former Confederate President Jefferson Davis for treason -- the trial ultimately never occurred.
Under the direction of President John Adams, the Congress passed the Sedition Act of 1798, which made it a criminal offence to publish statements critical of the federal government. The first individual to be tried under the law was Rep. Matthew Lyon, who unsurprisingly had voted against its passage. Lyon was re-elected from jail.
The U.S. Senate unanimously voted to pass what would become the 26th Amendment, lowering the voting age to 18.
On December 19th, 1998, the House of Representatives passed House Resolution 611, referred President Bill Clinton to the Senate for impeachment prosecution on charges of perjury and obstruction of justice