Class 2020 US Senators seniority list.

Retiring US Senators-
KS(Roberts-R)
NM(Udall-D)
TN(Alexander-R)
WY(Enzi-R)
Defeated US Senators-
AL(Jones-D)
AZ special(McSally-R)
CO(Gardner-R)
GA(Perdue-R)
IA(Ernst-R)
KY(McConnell-R)
ME(Collins-R)
NC(Tillis-R)
TX(Cornyn-R)

Incoming US Senator Seniority List.
NM(Lujan-D)
WY(Lummis-R)
AL(Byrne-R)
TN(Haslam-R)
TX(Hegar-D)
GA(Tomlinson-D)
NC(Cunningham-D)
AZ(Kelly-D)
CO(Johnston-D)
KY(McGrath-D)
IA(Greenfield-D)
KS(LaTurner-R)
ME(Gideon-D)