Incoming US Senators of 2020 if Democrats regain control of the US Senate in 2020.

AL(Tuberville-R)-1D/+1R
AZ special(Kelly-D)+1D/-1R
CO(Hickenlooper-D)+1D/-1R
GA special(Collins-R if he comes in first place in the primary and runoff)R hold.
IA(Greenfield-D)+1D/-1R
KS(Marshall-R or Bollier-D)
ME(Gideon-D)+1D/-1R
MA(Kennedy-D if he defeats Markey-D in the primary)D hold
MT(Bullock-D)+1D/-1R
NM(Lujan-D)D hold
NC(Cunningham-D)+1D/-1R
TN(Hagerty-R)R hold
WY(Lummis-R)R hold.
If Biden-D wins the 2020 US Presidential Election.
CA Governor Gavin Newsom will appoint a successor to VP elect Kamala Harris-D.
US Rep. Linda Sanchez.