Democrats will end up with 48 US Senate seats after 2020.

[nkpolitics1212]

Democrats win:
AZ(Kelly-D) 36D DEM GAIN
CO(Johnston-D) 37D DEM GAIN
DE(Coons-D) 38D DEM HOLD
IL(Durbin-D) 39D DEM HOLD
MA(Markey-D) 40D DEM HOLD
MI(Peters-D) 41D DEM HOLD
MN(Smith-D) 42D DEM HOLD
NH(Shaheen-D) 43D DEM HOLD
NJ(Booker-D) 44D DEM HOLD
NM(Lujan-D) 45D DEM HOLD
OR(Merkley-D) 46D DEM HOLD
RI(Reed-D) 47D DEM HOLD
VA(Warner-D) 48D DEM HOLD
If Democrats win to regain control of the US Senate in 2020, Democrats need to win:
GA(Tomlinson-D) 49D DEM GAIN
IA(Hart-D) 50D DEM GAIN
NC(Mansfield-D) 51D DEM GAIN.

[TexasTowelie]

1. If Democrats win the presidential election,

then we only need 50 seats since the VP is the tie-breaker.