President Pro Tempore: George Poindexter, Pat Harrison, James Eastland, John C. Stennis
Majority Leader: Trent Lott
Minority Leader: Trent Lott
Democratic Caucus Chairman: Hernando D. Money
Republican Conference Chairman: Thad Cochran
Party Whips: Trent Lott
Republican Conference Secretary: Thad Cochran, Trent Lott
Standing Committee Chairs Since 1947:
- Appropriations: John C. Stennis, Thad Cochran
- Armed Services: John C. Stennis
- Judiciary: James O. Eastland
- Agriculture, Nutrition, and Forestry: Thad Cochran
- Rules and Administration: Trent Lott
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