Oops, ThinEnd. sorry!
There isn't any democratic candidate who could openly say that transwomen aren't women.
This is definitely the party orthodoxy, but it hasn't been tested with voters yet. The NYT has stopped allowing comments on most gender identity articles because even its readers (who tend to be an urban lefty crowd) voice objections when given the opportunity. No mainstream news outlet has taken up the investigation of the myriad problems with gender ideology in the way that the Times and Telegraph and even Daily Mail have in the UK. Activists have been pretty successful so far in keeping a lid on dissent.
However, I have hope that this is starting to change.
WoLF seem to be growing and organizing bigger meetings. I love that they are connecting with British and Canadian women who have been standing up for women and girls in their own countries.
r/GenderCritical, which is not exclusively American but pretty heavily so, is growing leaps and bounds, to the tune of about a hundred new subscribers per day (over 50,000 total now). The Always Venus symbol, the JK Rowling tweet and other public spats are waking women up and making them curious about what's going on. Then, as has happened with a lot of MNrs, they google a bit, read more and more, and become increasingly more horrified at what's been going on behind the scenes.
The more the general public finds out about the law and policy changes gender advocates have implemented so quietly, the less well it sits. The James Younger pediatric transition custody battle this fall opened a lot of eyes. The CT girl athletes' Title IX complaint has the potential to build on that: even the most progressive political site I follow has posters expressing a lot of discomfort with males pushing females out of their opportunities.
The more sunlight is shone, the better. Just wait until some US paper gets brave enough to publish on the growing scandal of child medical transition.
I despair that none of the Democratic candidates can see this trajectory. I think their unthinking commitment to gender ideology is very likely to contribute to an electoral loss in 2020. And then, Goddess help us all...