The Senate filibuster against the Civil Rights Act of 1964 lasted 60 days and ended when the Senate invoked cloture by a vote of 71 to 29.
Notes on verification
Confirmed by Senate.gov and National Archives official records, with additional corroboration from Library of Congress, Constitution Center, PolitiFact, and Brennan Center. Minor discrepancy exists in some secondary sources citing 75 days, but this was debunked by PolitiFact; the 60-day, 71-29 figures match the official historical record. [tier=gold indep_score=1.0 clusters=6 claim_tier=notable | framework convergence=partial on U.S. Senate official historical record and National Archives cloture motion documentation (upstreams: U.S. Senate Historical Office, National Archives Center for Legislative Archives, Congressional Record) — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- Filibuster, cloture: US Senate rules featured in abortion debate | Politics News | Al Jazeera (seed:politics_and_current_events)
- https://www.senate.gov/about/powers-procedures/filibusters-cloture/civil-rights-filibuster-ended.htm (corroboration)
- https://www.archives.gov/legislative/features/civil-rights-1964/cloture-motion.html (corroboration)
- https://www.loc.gov/exhibits/civil-rights-act/civil-rights-act-of-1964.html (corroboration)
- https://constitutioncenter.org/blog/the-filibuster-that-almost-killed-the-civil-rights-act (corroboration)
- https://www.politifact.com/factchecks/2020/jul/30/facebook-posts/group-southern-democrats-not-all-democrats-held-19/ (corroboration)
- https://www.brennancenter.org/our-work/research-reports/case-against-filibuster (corroboration)