The ceiling would probably be 24 with wins by: Warren, McMahon, Baldwin, Heitkamp, Fischer, Berkley and Hirono.
No. Currently, there are seventeen female senators, two of whom are retiring, so we start off with a baseline of fifteen, assuming all incumbents are reelected. So even if all seven win along with McCaskill, it would be 22.
The scenario I currently project is a victory for Warren, Baldwin, Fischer, Hirono, and McCaskill, but losses for Berkley, Heitkamp, and McMahon. That would mean a total of 19 women in the Senate, a net gain of 2.
