2016/2018/2020 US Senate Election.
2016- Vulnerable Democratic seats are CO and NV, Vulnerable Republican seats are FL,IL,NH,NC,OH,PA,and WI. Democrats will win CO,NV(if Sandoval-R does not run),FL,IL,NH(if Hassan-D runs),OH,and WI. 51D Republicans will win NV(if Sandoval-R runs),NH(if Hassan-D does not run),NC,and PA. 51R. Democrats have a 50-50 chance of regaining control of the US Senate.
2018- Vulnerable Democratic seats are FL,IN,MI,MO,MT,ND,OH,WV,and WI. Vulnerable Republican seats are AZ and NV. Democrats will win FL,MI,OH,and WI due the Tossup Governor Races in those states and MT,ND,and WV due to the popularity of the Democratic incumbents. Republicans will win AZ,IN,MO,and NV. Republicans will regain control of the US Senate.
2020- Vulnerable Democratic seats are NH and VA, Vulnerable Republican Seats are CO,IA,ME(if Collins-R retires),and NC. Democrats will win CO,IA,ME(if Collins retires),NH,NC,and VA. Democrats will regain control of the US Senate.