Officers
Chaplains
Party Secretaries
Presidents Pro Tempore
Secretaries of the Senate
Sergeants at Arms
Vice Presidents (President of the Senate)
Staff
Oral History Interviews
"Senate Chaplain" (pdf) by Robert C. Byrd
Looking for more information about Senate Majority Leaders?
Biographical Essays History of Floor Leaders Complete List
If you'd like to learn more about the Constitution, this annotated bibliography is a good place to start.