How many US Senate seats will Democrats pick up in 2020,2022,and 2024?

[nkpolitics1212]

2020
Democratic held US Senate seats that are vulnerable.
AL- Jones-D loses to a Generic R who is not Roy Moore.-1D
MI- Peters-D vs James-R will be close but Peters-D ends up winning.
Republican held US Senate seats that are vulnerable.
AZ- McSally-R loses to likely Democratic nominee- Kelly-D. +1D/0D
CO- Gardner-R loses to likely Democratic nominee- Hickenlooper-D. +2D/+1D
ME- Collins-R loses to likely Democratic nominee- Gideon-D. +3D/+2D
NC- Tillis-R loses to likely Democratic nominee- Cunningham-D. +4D/+3D
Democrats will have a net gain of 3 US Senate seats in 2020.
2022
Democratic held US Senate seats that are vulnerable.
AZ-Kelly-D vs Ducey-R is a race to watch.
Republican held US Senate seats that are vulnerable.
IA(OPEN Grassley-R) Republicans nominate Steve King-R. +1D
NC(OPEN Burr-R) Democrats nominate Dan McCready-D. +2D
PA(Toomey-R) Democrats nominate Conor Lamb-D. +3D
WI(OPEN Johnson-R) Democrats nominate Ron Kind-D. +4D.
Democrats will have a net gain of 3 US Senate seats in 2022.
2024
Democratic held US Senate seats that are vulnerable.
MT(Tester-D) vs Stapleton-R.
WV(Manchin-D) vs Mooney-R
Republican held US Senate seats that are vulnerable.
FL(Scott-R) Democrats nominate Nikki Fried-D.
TX(Cruz-R) Democrats nominate Colin Allred-D.

[rzemanfl]

1. Hopefully all of them plus D.C. and Puerto Rico.

On edit, because they will become states.

[TwilightZone]

2. "Republicans nominate Steve King-R."

Zero chance of that happening. King can't win a state-wide race and the GOP is 100% aware of this.