Rella, if those stats are accurate, and Dems are preferring male over female candidates, then that kind of goes against the media narrative that the majority of US citizens want to (and will) elect a woman in 2020 - just so that glass ceiling can be broken.
A name I didn't see mentioned as a possibility is Michelle Obama. Her name keeps getting floated out there and touted as the woman who could beat Trump. However, I don't know what she has to offer in the way of accomplishments except for her failed school lunch program - which Trump has already rolled back. The campaign commercials could be quite entertaining, though. Pics of Michelle's school lunches (dried up carrot sticks and wilted lettuce leaves) juxtaposed with the Obamas indulging themselves with McDonald's and ice cream.