US Senate seats that Democrats will win to get back in the majority in 2020 are going to be-

1)RI(Reed-D)36
2)MA(Markey/Kennedy-D)37
3)NJ(Booker-D)38
4)DE(Coons-D)39
5)IL(Durbin-D)40
6)OR(Merkley-D)41
7)VA(Warner-D)42
8)NM(Lujan-D)43
9)MN(Smith-D)44
10)NH(Shaheen-D)45
11)MI(Peters-D)46
12)CO(Hickenlooper-D)47
13)AZ special(Kelly-D)48
14)NC(Cunningham-D)49
15)ME(Gideon-D)50
Democrats will win the 2020 US Presidential Election Electoral College vote.
Clinton 2016 states(232ev) plus PA-20(252ev), MI-16(268ev) and WI-10(278ev)
The 51st US Senate seat for Democrats will be-
AL(Jones-D),GA regular(Ossoff-D),GA special runnoff(Warnock-D),IA(Franken/Greenfield-D),KS(Bollier-D vs Kobach-R),KY(McGrath-D),MT(Bullock-D) or TX(Hegar/West-D).