A congressional caucus is a group of members of the United States Congress that meet to pursue common legislative objectives. Formally, caucuses are formed as congressional member organizations (CMOs) through the United States House of Representatives and the United States Senate and governed under the rules of these chambers. In addition to the term "caucus", they are sometimes called conferences (especially Republican ones), coalitions, study groups, task forces, or working groups. Many other countries use the term parliamentary group; the Parliament of the United Kingdom has many all-party parliamentary groups. Party caucuses and conferences in the United States Congress The largest caucuses are the party caucuses and conferences in the United States Congress, which are the partisan caucuses comprising all members of one house from one party (either the Democrats or the Republicans) in addition to any independent members who may caucus with either party. These are the House Democratic Caucus, House Republican Conference, Senate Democratic Caucus and Senate Republican Conference. The caucuses meet regularly in closed sessions for both the House of Representatives and the Senate to set legislative agendas, select committee members and chairs and hold elections to choose various floor leaders. They also oversee the four Hill committees, political party committees that work to elect members of their own party to Congress. Ideological conferences Ideological congressional caucuses can represent a political party within a political party. In the United States two-party dominant political system, these congressional caucuses help congregate and advance the ideals of a more focused ideology within the two major relatively big tent political parties. Some caucuses are organized political factions with a common ideological orientation. Most ideological caucuses are confined to the House of Representatives. Racial and ethnic caucuses Among the most visible caucuses are those composed of members sharing the same race or ethnic group. The most high profile of these represent people of color. The Congressional Black Caucus, Congressional Hispanic Caucus, and the Congressional Asian Pacific American Caucus also form the Congressional Tri Caucus when they sit together. The Congressional Black Caucus for African-Americans The two Hispanic caucuses: The Congressional Hispanic Caucus for Hispanic Democrats only (Hispanic Republicans are barred from membership per 2000s rule change) The Congressional Hispanic Conference for Hispanic Republicans, who formerly belonged to the Hispanic Caucus but later split off to form the Hispanic Conference The Congressional Asian Pacific American Caucus represents members who are Asian Americans and