US Senate seats up for re-election in 2020 most likely to least likely to flip.

1)AL(Jones-D)/Tuberville-R 31
2)CO(Gardner-R)/Hickenlooper-D 36
3)AZ special(McSally-R)/Kelly-D 37
4)NC(Tillis-R)/Cunningham-D 38
5)ME(Collins-R)/Gideon-D 39
6)MT(Daines-R)/Bullock-D 40
7)MI(Peters-D)41
8)GA special(Loeffler-R)/Collins-R 32
9)IA(Ernst-R)33
10)KS(OPEN-Roberts-R)/Kobach-R 34
11)GA regular(Perdue-R) 35
12)TX(Cornyn-R)36
13)NH(Shaheen-D)42
14)MN(Smith-D)43
15)NM(OPEN-Udall-D)/Lujan-D 44
16)KY(McConnell-R)37
17)SC(Graham-R)38
18)MS(Hyde Smith-R)39
19)AK(Sullivan-R)40
20)TN(OPEN- Alexander-R)/Hagerty-R 41
21)VA(Warner-D)45
22)OR(Merkley-D)46
23)DE(Coons-D)47
24)WV(Moore Capito-R)42
25)IL(Durbin-D)48
26)NJ(Booker-D)49
27)MA(Markey-D)/Kennedy-D 50
28)RI(Reed-D)51
29)LA(Cassidy-R)43
30)NE(Sasse-R)44
31)SD(Rounds-R)45
32)ID(Risch-R)46
33)OK(Inhofe-R)47
34)WY(OPEN-Enzi-R)/Lummis-R 48
35)AR(Cotton-R) 49