Committee Assignment Process in the U.S. Senate, and the Nuclear Option

Nuclear Option

The nuclear option is a parliamentary procedure that allows the United States Senate to override a standing rule of the Senate, such as the 60-vote rule to close debate, by a simple majority of 51 votes, rather than the two-thirds supermajority normally required to amend the rules. The option is invoked when the majority leader raises a point of order that contravenes a standing rule, such as that only a simple majority is needed to close debate on certain matters. The presiding officer denies the point of order based on Senate rules, but the ruling of the chair is then appealed and overturned by majority vote, establishing new precedent.

This procedure uses Rule XX to allow the Senate to decide any issue by simple majority vote, regardless of Rule XXII, which requires the consent of 60 senators (out of 100) to end a filibuster for legislation and 67 for amending a Senate rule.

https://en.wikipedia.org/wiki/Nuclear_option