Incoming US Senators if Democrats regain control of the US Senate in 2020.

35 Democratic US Senators are not up for re-election in 2020
Democratic US Senators seeking re-election in 2020 and favored to win re-election.
36)RI(Reed-D)
37)MA(Markey-D) if he wins in the Democratic Primary against Kennedy-D.
38)DE(Coons-D)
39)NJ(Booker-D)
40)OR(Merkley-D)
41)IL(Durbin-D)
42)VA(Warner-D)
43)NH(Shaheen-D)
44)MN(Smith-D)
45)MI(Peters-D)
Democratic US Senator retiring and likely to be replaced by a Democrat.
46)NM(Udall-D)Lujan-D
Republican US Senate seats up for re-election in 2020 likely to go Democratic.
47)CO(Gardner-R)Hickenlooper-D
48)AZ special(McSally-R)Kelly-D
49)NC(Tillis-R)Cunningham-D
50)KS(OPEN Roberts-R)Bollier-D vs Kobach-R
51)ME(Collins-R)Gideon-D
Incoming Republican US Senators
AL(Sessions-R)
GA(Collins-R)
KS(Marshall-R)
OK(Pruitt-R) if Inhofe-R retires.
TN(Hagerty-R)
WY(Lummis-R)