Republican held US Senate seats up in 2020 that Democrats will win to regain control in 2020.

35 Democratic held US Senate seats are not up for re-election in 2020.
30 Republican held US Senate seats are not up for re-election in 2020.
Democratic held US Senate seats up for re-election in 2020 that is going to remain in the Democratic column.
36)DE(Coons-D)
37)IL(Durbin-D)
38)MA(Markey-D)Kennedy-D
39)MI(Peters-D)
40)MN(Smith-D)
41)NH(Shaheen-D)
42)NJ(Booker-D)
43)NM(OPEN Udall-D)Lujan-D
44)OR(Merkley-D)
45)RI(Reed-D)
46)VA(Warner-D)
Democratic held US Senate seats up in 2020 that will go Republican.
31)AL(Jones-D)Sessions-R
Republican held US Senate seats up in 2020 that will remain in the Republican column.
32)AK(Sullivan-R)
33)AR(Cotton-R)
34)ID(Risch-R)
35)KS(OPEN Roberts-R)Marshall-R
36)KY(McConnell-R)
37)LA(Cassidy-R)
38)MS(Hyde Smith-R)
39)MT(Daines-R)
40)NE(Sasse-R)
41)OK(Inhofe-R)
42)SC(Graham-R)
43)SD(Rounds-R)
44)TN(OPEN Alexander-R)Hagerty-R
45)TX(Cornyn-R)
46)WV(Moore Capito-R)
47)WY(OPEN Enzi-R)Lummis-R
Republican held US Senate seats up in 2020 that will go Democratic.
47)AZ special(McSally-R)Kelly-D
48)CO(Gardner-R)Hickenlooper-D
49)ME(Collins-R)Gideon-D
50)NC(Tillis-R)Cunningham-D
Republican held US Senate seats up in 2020 that could go either way.
GA regular(Perdue-R)
GA special(OPEN Isakson-R)
IA(Ernst-R)