The role of certain congress members, in the leadership of both parties, responsible for legislative strategy, building support and coalitions for key issues, and informal vote counting is called a party whip.
Party whip is a member of party leadership in both House of Representatives and Senate. They seek to align their political party members around a shared agenda and voting option. Additionally, they coordinate with other party leaders to ensure that all the lawmakers vote in the same manner on a piece of legislation. Basically, they ensure party discipline in a legislature. Traditionally, whip serves as assistant leaders rounding up votes and quorum calls. Occasionally, they stand in for the majority or minority leaders in their absence.
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