The political party officer in the Congress of the United States charged with "whipping" the members into line, enforcing attendance, and voting discipline is called the whip. Each party has its own whip in each house. The office was formally initiated in the House of Representatives of the United States in 1899 and in the Senate of the United States in 1913. The office and its name originated in the British Parliament, where failure to follow the whip on important votes is tantamount to withdrawing from the parliamentary party.