Democrats need to win at least 5 Republican held US Senate seats up for re-election in 2020,

In order to regain control of the US Senate in 2020.
Democrats are going to win every Democratic held US Senate seat up for re-election in 2020 except AL.
35 Democratic held US Senate seats are not up for re-election in 2020.
Democratic held US Senate seats up for re-election in 2020 that Democrats are favored to win are in DE,IL,MA,MI,MN,NH,NJ,NM,OR,RI,and VA. 46D.
The 2020 US Presidential Race is a Tossup. If Trump wins, Democrats need 51 seats. If Warren or Sanders win, Warren-MA US Senate seat will briefly go Republican.
The 5 Republican held US Senate seats up for re-election in 2020 that Democrats have a decent chance of winning are:
1)CO(Gardner-R vs Hickenlooper-D)
2)AZ special(McSally-R vs Kelly-D)
3)NC(Tillis-R vs Cunningham-D)
4)ME(Collins-R vs Gideon-D)/GA(Perdue-R vs Ossoff-D)
5)GA special/TX(Cornyn-R vs Hegar-D).