The Senate has a Majority Whip and a Minority Whip too.
The Assistant Majority and Minority Leaders of the United States Senate (commonly called Senate Majority and Minority Whips) are the second-ranking members of their parties in the United States Senate.
The main function of the Majority and Minority Whips is to gather votes on major issues. Because he or she is the second ranking member of the Senate, if there is no floor leader present, the whip may become acting floor leader.
Before 1969, the official titles were Majority Whip and Minority Whip.
The current Assistant Majority Leader is Republican Mitch McConnell of Kentucky.
The current Assistant Minority Leader is Democrat Richard Durbin of Illinois.
(Names in Bold indicate Majority)