Filibuster
In the United States, current rules in the Senate require all Senators to be allowed to deliver a speech for as long as they want. Voting cannot begin until all Senators finish giving their speeches. A filibuster allows a senator to block a bill by speaking on behalf of the bill for too long on purpose so it would not be brought to a vote. To pass a bill, the Senate only needs at least 50 votes (out of 100) in support of the bill. To end a filibuster will require cloture which requires 60 votes (out of 100) in support. A cloture would allow the bill to be voted on because it forces all debates to end.