However, since reaching a vote on a contested proposal to amend the Senate Standing Rules likely would require, under Rule XXII, invoking cloture with the support of two-thirds of Senators voting, some supporters of change have advocated making changes to Senate procedure instead by establishing a new precedent (basically, a reinterpretation of the rules). Some Senators and outside observers have used the term "nuclear" to describe such proceedings, in part because they might rely on steps that are novel (potentially in contravention of existing rules and precedents), or because they could undermine the prerogatives exercised heretofore by Senate minorities or individual Senators. As on legislation, a cloture motion filed on a nomination under Rule XXII receives a vote after two days of Senate session. As a result, reaching a vote on the motion does not require a cloture process, so a simple majority of those voting can agree to bring up the nomination without requiring a supermajority to invoke cloture in order to limit debate on the question of bringing up the nomination. Specifically, for the remainder of the 113 th Congress, all but the very highest of executive nominations are subject to a maximum of eight hours of post-cloture consideration, and district judge nominations are subject to only two hours, post-cloture. (See Table 1 below.) The November 21 Precedent: Some Effects and Implications

		Reinterpretation of Rule XXII

The precedent set on November 21, 2013, did not change the text of Rule XXII of the Standing Rules. In summary, in floor proceedings on November 21, the Senate established a new precedent by which it has reinterpreted the provisions of Rule XXII to require only a simple majority to invoke cloture on most nominations. Effect on Senate Floor Consideration of Nominations

The effect of the Senate's new precedent is to lower the vote threshold by which cloture can be invoked on a nomination other than to the U.S. Supreme Court from three-fifths of the Senate to a simple majority of those voting, thereby enabling a supportive simple majority to reach an "up-or-down" vote on confirming the nomination. Other Potential Effects on Presidential Nominations

Broader effects of the November 21 precedent cannot yet be fully assessed, but the precedent could have implications for elements of the nomination and confirmation process that occur prior to floor consideration. 116 , or not), except for those to the Supreme Court. In addition, while the lower threshold for cloture on nominations will remain in effect until the Senate takes further action to alter it, the reduction in the limits on post-cloture consideration for certain nominations (pursuant to S.Res. Effect on Future Proposals to Change Senate Rules or Practices

The procedures by which the precedent was set also may have implications for future proposals to alter Senate rules or their application. A key procedural detail on which the November 21 proceedings turned was the inability of opponents of these proceedings to extend debate on the appeal of the chair's ruling. Since the practicability of proposed "nuclear" proceedings has often turned on the Senate being able to reach a vote to establish new procedures in a contested situation, the parliamentary circumstances under which the new precedent was set will likely be examined for their implications for future attempts to change Senate rules or the Senate's interpretation and application of them. Appendix. The majority leader appealed the ruling of the chair. Based on the precedent just set by the Senate providing that a numerical majority was sufficient for invoking cloture on certain nominations (of which the Millett nomination was one), the presiding officer announced that the motion was agreed to.
On November 21, 2013, by overturning a ruling of the chair on appeal, the Senate set a precedent that lowered the vote threshold required by Senate Standing Rule XXII for invoking cloture on most presidential nominations. The precedent did not change the text of Rule XXII of the Standing Rules; rather, the Senate established a precedent reinterpreting the provisions of Rule XXII to require only a simple majority of those voting, rather than three-fifths of the full Senate, to invoke cloture on all presidential nominations except those to the U.S. Supreme Court.
The precedent does not eliminate the potential need for a cloture process for the Senate to reach a vote on a contested nomination. The time required to invoke cloture on a pending nomination remains as it was before the precedent. Specifically, nominations are still subject to Rule XXII's requirement that (1) a cloture motion filed on a pending nomination lie over for two days of Senate session prior to the cloture vote, and (2) the nomination be subject to an additional 30 hours of post-cloture consideration prior to a vote on confirmation. For the 113th Congress only (pursuant to S.Res. 15), this post-cloture time limit is eight hours for most nominations and two hours for U.S. District Court judges; the limit is still 30 hours for high level executive nominations and the top judicial positions (see Table 1).
The only direct effect of the new precedent is to change the vote threshold by which the Senate can invoke cloture (and thereby eventually reach a vote) on these nominations from three-fifths of the Senate to a numerical majority of Senators voting (with a quorum present). However, to the extent that the change may effectively limit the floor leverage of Senators opposing a nomination, there may be implications for the pre-floor stages during which nominations are vetted.
In addition, the parliamentary circumstances under which the November 21 precedent was set will likely be examined for their implications for future attempts to change Senate procedures. A key element of the feasibility of such action is whether a Senate majority in favor of change can reach a vote to establish new procedures in the face of opposition. Reaching a vote to reinterpret existing rules, in a contested situation, might rely on steps that are novel or potentially are in contravention of existing rules and precedents; in addition, the effects of such actions could also undermine the existing procedural prerogatives available to Senators. Such proceedings have sometimes been called the "nuclear option." In this context, an important feature of the proceedings of November 21 was the inability of opponents to extend debate on the appeal of the chair's ruling.
This report explains the procedural context within which the precedent was set and addresses the precedent's effects on floor consideration of nominations (as well as noting other potential effects on the nominations process). In addition, since the parliamentary circumstances under which the precedent was set fall within proceedings often called the "nuclear option," the report concludes by briefly noting the precedent's relevance for future proposals to alter or reinterpret Senate rules through the establishment of new precedent. An Appendix details the key procedural steps by which the precedent was set. This report will be updated if events warrant, or to add citations to additional CRS reports that address related issues.