6 seats is the likeliest plausible maximum for Senate Dems to pick (NC, ME, OH, TX, AK, IA) = 53 seats
1 = 54 if Osborn wins in NE and caucuses with Dems
1 in 2028 = 55 if Dems flip WI.
So 55 likeliest ceiling for Dems through 2020s (absent Senate-packing).
NEW Crystal Ball Senate Rating Changes
Alaska Leans R to Toss-up
NC Toss-up to Leans D
Ohio Leans R to Toss-up
GOP still favored because they only need one of the four Toss-ups, while Ds need all four