2018 and 2020 US Senate Election.

2018
All of the Democratic held US Senate Seats in blue and purple states remain in the Democratic column.
CA,CT,DE,FL,HI,ME,MD,MA,MI,MN,NJ-if Menendez-D resigns after Christie-R leaves the NJ Governorship,NM,NY,PA,RI,VT,VA,WA,and WI. 42D
Looking at the Democratic held US Senate Seats in red states (IN,MO,MT,ND,OH,and WV)-Democrats will hold onto MT,ND,and OH. 45D
Democrats pick up AZ and NV- 47D (-1D)
2020
All of the Democratic held US Senate seats in blue and purple states remain in the Democratic column.
DE,IL,MA,MI,MN,NH,NJ,NM,OR,RI,and VA. 47D
Democrats pick up AZ (McCain seat),CO,ME-if Collins retires or loses in the primary,and NC. 50D/51D (+3D/+4D)
Democrats could also pick up MT-if Bullock-D runs. 52D