The previous record is 24 hours and 18 minutes, held by Strom Thurmond, then a Democratic, racist, and segregationist United States senator from South Carolina,

The previous record is 24 hours and 18 minutes, held by Strom Thurmond, then a Democratic, racist, and segregationist United States senator from South Carolina, who began a filibuster intended to prevent the passage of the Civil Rights Act of 1957.