Maximum number of US Senate seats Democrats could win in 2020,2022,and 2024.

2020-35 Democratic held US Senate seats are not up for re-election in 2020.
Democrats have a 50-50 or greater chance of winning:
AZ special(Kelly-D)36
CO(Hickenlooper-D)37
DE(Coons-D)38
GA regular(Tomlinson-D)39
GA special(Tarver-D)40
IL(Durbin-D)41
IA(Greenfield-D)42
ME(Gideon-D)43
MA(Markey-D)44
MI(Peters-D)45
MN(Smith-D)46
NH(Shaheen-D)47
NJ(Booker-D)48
NM(Lujan-D)49
NC(Cunningham-D)50
OR(Merkley-D)51
RI(Reed-D)52
VA(Warner-D)53
2022- 37 Democratic held US Senate seats are not up for re-election in 2022.
Democrats have a 50-50 or greater chance of winning:
AZ(Kelly-D)38
CA(Harris-D)39
CO(Bennet-D)40
CT(Blumenthal-D)41
GA(Tarver-D)42
HI(Schatz-D)43
IL(Duckworth-D)44
IA(Finkenauer-D or Axne-D)45
MD(Van Hollen-D)46
NV(Cortez Masto-D)47
NH(Hassan-D)48
NY(Schumer-D)49
NC(Ross-D or Martin-D)50
OH(Ryan-D)51
OR(Wyden-D)52
PA(Fetterman-D)53
VT(Leahy-D)54
WA(Murray-D)55
WI(Kind-D or Pocan-D)56
2024- 33 Democratic held US Senate seats are not up for re-election in 2024.
AZ(Sinema-D)34
CA(Democratic Primary Winner-D)35
CT(Murphy-D)36
DE(Carper-D)37
FL(Soto-D)38
HI(Democratic Primary Winner-D)39
ME(Democratic Primary Winner-D)40
MD(Democratic Primary Winner-D)41
MA(Democratic Primary Winner-D)42
MI(Stabenow-D)43
MN(Klobuchar-D)44
MT(Tester-D)45
NV(Rosen-D)46
NJ(Democratic Primary Winner-D)47
NM(Heinrich-D)48
NY(Gillibrand-D)49
OH(Brown-D)50
PA(Casey-D)51
RI(Whitehouse-D)52
TX(Castro-D)53
VT(Democratic Primary Winner-D)54
VA(Kaine-D)55
WA(Cantwell-D)56
WV(Manchin-D)57
WI(Baldwin-D)58