The United States Senate: "Party Leadership"

Use this site to explore the various aspects of the Senate's leadership structure. The Senate leadership consists of the presiding officer, majority leader, minority leader, and whips. Unlike in the House, where the Speaker wields considerable power, the presiding officer is not the most visible member of the Senate and can only vote in case of a tie. The majority and minority leaders work together to schedule and manage Senate business. Whips are less important in the Senate than in the House because the closer personal relationships that develop in the smaller body make it easier to know how members will vote without a formal whip count.

Click http://www.senate.gov/history/leader.htm link to open resource.