cloture
Cloture
It is fairly unimportant, since the debate can be ended by a majority vote.
The longest filibuster came in spring of 1964 when the U.S. Senate was weighing Lyndon Johnson's Civil Rights Bill. The bill had been introduced by President Kennedy a year earlier but not taken up for debate until after his death. Debate began in March of 1964. Before it was over, Southern senators had filibustered for 534 hours, 1 minute, and 51 seconds. When the Senate finally mustered enough votes to end the filibuster, an aging California senator was wheeled onto the floor and voted by winking his eye. With the filibuster ended, the Senate approved the bill on June 20 and it was signed into law on July 2, 1964.
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Senate of Ceylon ended in 1971.
Senate of Senegal ended in 2001.
Senate of Bavaria ended in 1999.
Greek Senate ended in 1832.
Prevented? Well, it can be ended by a vote of cloture, which requires 60 votes. ..if that's what you mean.
Tasmania Senate Team ended in 1996.
Senate of South Africa ended in 1981.
Senate of the Republic of Poland ended in 1946.