World Events2020sUnited Stateshigh confidence

Sen. Cory Booker's more-than-25-hour Senate speech surpassed the previous record set by Sen. Strom Thurmond of South Carolina during a 1957 filibuster against the advance of the Civil Rights Act.

Notes on verification

Confirmed by multiple independent, high-quality sources including NBC News, Yahoo/AP, and C-SPAN, all consistent on the timing details (25 hrs 4-5 min vs Thurmond's 24 hrs 18 min in 1957). Minor nuance that Booker's speech was not technically a filibuster does not affect the core claim's accuracy. [tier=silver indep_score=0.833 clusters=3 claim_tier=notable]

Sources