In America's first use of the Presidential veto, George Washington vetoed legislation affixing the size of the House of Representatives at 120 members.
Sen. Rand Paul's motion to hold that the Senate cannot try an impeached official who is no longer in office was defeated 55-45. Most legal scholars agree such a trial is permissible.
Tammy Baldwin (D-WI) became the first openly LGBT senator in 2012.
The Civil Rights Act of 1964 outlawed discrimination based on race, sex, and national origin in employment, accommodation, and education.
As Joe Biden is inaugurated as America's 46th President, browse his votes as a U.S. Senator