The term for the politicians who enforce party discipline in both British and American legislatures, as well as many others, is "whips." Whips are officials of a political party whose primary task is to ensure party discipline by making sure party members vote according to the party line and maintain cohesion within the legislature. They act as the party's enforcers, managing attendance for votes and coordinating party strategy on the floor of the legislature

. In the Westminster system (used in the UK, Canada, Australia, and others), whips play a crucial role in maintaining strict party discipline, often with strong consequences for members who break ranks. In the United States, while party discipline is generally weaker due to the federal presidential system, whips still serve the function of encouraging party cohesion and managing legislative voting

. Thus, the official term for these politicians is "whips."