The Senate Leadership of 110th United States Congress

Today marks the start of the 110th Congress. The leadership in the Senate looks to be as followed.[i]

Senate
President of the Senate: Dick Cheney (R-Wyoming)
President pro tempore: Robert Byrd (D-West Virginia)
President pro tempore emeritus: Ted Stevens (R-Alaska)

Majority (Democratic) leadership
Senate Majority Leader and Democratic Conference Chairman: Harry Reid (Nevada)
Senate Majority Whip: Richard Durbin (Illinois)
Democratic Conference Vice Chairman and Democratic Campaign Committee Chairman: Charles Schumer (New York)
Democratic Conference Secretary: Patty Murray (Washington)
Democratic Policy Committee Chairman: Byron Dorgan (North Dakota)
Steering and Outreach Committee Chair: Debbie Stabenow (Michigan)
Committee Outreach Chairman: Jeff Bingaman (New Mexico)
Committee Outreach Vice-Chair: Hillary Rodham Clinton (New York)
Rural Outreach Chair: Blanche Lincoln (Arkansas)
Chief Deputy Whip: Barbara Boxer (California)
Deputy Whips: Thomas Carper (Delaware), Bill Nelson (Florida), Russell D. Feingold (Wisconsin)

Minority (Republican) leadership
Senate Minority Leader: Mitch McConnell (Kentucky)
Senate Minority Whip: Trent Lott (Mississippi)
Republican Conference Chairman: Jon Kyl (Arizona)
Republican Policy Committee Chairman: Kay Bailey Hutchison (Texas)
Republican Conference Vice Chair: John Cornyn (Texas)
Republican Campaign Committee Chair: John Ensign (Nevada)
Counselor to the Minority Leader: Robert Bennett (Utah)

More information on the composition of the Senate can be found on Wikipedia.

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[i] Wikipedia