Who served as the Senate Majority Whip?

Richard Durbin has served as the Senate Majority Whip, a position he has held since 2021. As Majority Whip, Durbin plays a crucial role in party leadership by assisting the Senate Majority Leader in managing the legislative agenda and ensuring party discipline among the members. This involves counting votes, rallying support for bills, and strategizing to advance the party’s priorities in the Senate.

While Harry Reid, Jon Kyl, and Mitch McConnell have all held significant leadership roles in the Senate, including Majority Leader or Minority Leader, it is Durbin who is specifically recognized for the role of Majority Whip in the current context. Therefore, his relevant experience and position underline why he is the correct answer to the question.