When the Democratic whip's position fell vacant in 1933, as Senate Democrats returned to the majority after an extended season in the minority, they elected Lewis to that post. Following his death in 1939, the Senate accepted a portrait of its first whip—perhaps to inspire his successors. 1878: Senators Require a Whip -- May 28, 1913. In the United States Congress, the Whip is responsible for informing party members of upcoming votes and keeping track of their voting behavior. The Whip is usually part of the leadership team of the party and is appointed by the Speaker of the House or the Senate Majority Leader. mQHOrx.