 Byrd joined with Democratic senators to filibuster the Civil Rights Act of 1964, personally filibustering the bill for 14 hours, a move he later said he regretted.Despite an 83-day filibuster in the Senate, both parties in Congress voted overwhelmingly in favor of the Act (Democrats 47–16, Republicans 30–2), and President Johnson signed the bill into law.Byrd cast no vote on the Voting Rights Act of 1965, and voted against the confirmation of Thurgood Marshall to the U.S. Supreme Court.