In political systems, a "whip" is not a thing, but a person. Often one of the highest positions within a legislative or parliamentarian body (depending on the form of government), the whip is an assistant to a political party
Whip, government
Party leaders of the United States Senate - Wikipedia
Second Amendment Congresswoman Laurel Lee
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John Thune, Republican, South Dakota, Senate Majority Whip
Tom Emmer - Wikipedia
Nancy Pelosi, first woman to serve as speaker of the U.S. House, steps down from leadership • Tennessee Lookout
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Eric cantor whip hi-res stock photography and images - Alamy
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Jim Clyburn - Wikipedia
House Majority Whip Library of Congress