Constitutionally Mandated Offices:

President of the Senate - Joseph R. Biden, Jr. (D) Delaware, VP of the United States

President Pro Tempore - Orin G. Hatch, (R), Utah

Republicans

Majority Leader - Mitch McConnell (R), Kentucky

Majority Whip -John Cornyn (R) Texas

Republican Conference Chair -John Thune (R), South Dakota

Republican Policy Committee Chair -John Barrasso, (R) Wyoming

Republican Conference Vice Chair-  Roy Blunt (R) Missouri

Democrats

 

Minority Leader - Harry Reid (D), Nevada
Minority Whip - Richard Durbin (D), Illinois

Democrat Conference Chair, Harry Reid (D), Nevada

Democrat Conference Vice Chair & Policy Committee Chair, Charles Schumer (D) New York

Democrat Conference Secretary - Patty Murray (D), Washington

 

Further Reading:

FIND / CONTACT YOUR SENATOR

 

United States Senate