Meghan Markle is 38 years old, and a natural-born U.S. citizen
(link). Like Barack Obama she's half-black and half-white, though her mother is the African-American side, not her father. Ms. Markle checks off the "boxes" for diversity, youth and female gender. And she's apparently widely admired. My virtue of Megxit she's no longer royalty.
This is in stark contrast to most of the announced Democratic candidates, a veritable clown car. She'd make an interesting candidate, I say.