Dirksen Senate Office Building Committee Room 226 is used for hearings by the Senate Judiciary Committee. The Senate uses committees (as well as their subcommittees) for a variety of purposes, including the review of bills and the oversight of the executive branch. The appointment of committee members is formally made by the whole Senate, but the choice of members is actually made by the political parties. Generally, each party honors the preferences of individual senators, giving priority on the basis of seniority.Each party is allocated seats on committees in proportion to its overall strength. Most committee work is performed by 16 standing committees, each of which has jurisdiction over a specific field such as Finance or Foreign Relations. Each standing committee may consider, amend, and report bills that fall under its jurisdiction. Furthermore, each standing committee considers presidential nominations to offices related to its jurisdiction. (For instance, the Judicial Committee considers nominees by judgeships, and the Foreign Relations Committee considers nominees positions in the Department of State.) Committees have extensive powers with regard to bills and nominees; they may block nominees and impede bills from reaching the floor of the Senate. Standing committees also oversee the departments and agencies of the executive branch. In discharging their duties, standing committees have the power to hold hearings and to subpoena witnesses and evidence.
The Senate also has several committees that are not considered standing committees. Such bodies are generally known as select committees or special committees; examples include the Select Committee on Aging. Legislation is referred to some of these committees, although the bulk of legislative work is performed by the standing committees. Committees may be established on an ad hoc basis for specific purposes; for instance the Senate Watergate Committee was a special committee created to investigate the Watergate scandal. Such temporary committees cease to exist after fulfilling their tasks.
The Congress includes joint committees, which include members of both the Senate and the House of Representatives. Some joint committees oversee independent government bodies; for instance, the Joint Committee on the Library oversees the Library of Congress. Other joint committees serve to make advisory reports; for example, there exists a Joint Committee on Taxation. Bills and nominees are not referred to joint committees. Hence, the power of joint committees is considerably lower than those of standing committees.
Each Senate committee and subcommittee is led by a chairman (usually a member of the majority party). Formerly, committee chairmanship was determined purely by seniority; as a result, several elderly senators continued to serve as chairmen despite severe physical infirmity or even senility. Committee chaimen are elected, but, in practice, seniority is rarely bypassed. The chairmen hold extensive powers: they control the committee’s agenda, and so decide how much, if any, time to give to a bill; they act with the power of the committee in disapproving or delaying a bill or a nomination by the president; they manage the bills the committee reports on the floor, which was particularly important in mid-century, when floor amendments were thought uncollegial. They also have considerable influence: a Senator who cooperates with his committee chairman is likely to accomplish more good for his State than one who does not. The Senate rules and customs were reformed in the twentieth century, largely in the 1970’s; committee chairmen have somewhat less power, and are in general more moderate and collegial in exercising it, than they were before reform. The second-highest member, the spokesperson on the committee for the minority party, is known in most cases as the Ranking Member. In the Select Committee on Intelligence and the Select Committee on Ethics, however, the senior minority member is known as the Vice Chairman.