A caucus revolt occurs when enough members of a political party pressure its leadership to step down or to remove planned bills, legislation or policies from its platform. A caucus revolt generally concludes with the party leader resigning their position as such a revolt is usually seen to show poor leadership skills. Often the mere appearance of a revolt in the caucus maybe enough to force a leader to step down.
In Westminster style governments, if the party suffering from a caucus revolt is the current government, often an interim leader will be appointed by the party until a leadership convention can be held to elect a new leader, or a general election can be called should the party leader find a way to survive the revolt.
In the United Kingdom the term caucus is used less and the concept is more commonly known as a backbench rebellion.[1]