Well I doubt they would go birther on her, she's clearly a Chicago native, but definitely the Trumpist maga fascist echo chamber of lies is already fully onboard with the absurd belief that she is a man (and Barack is gay. etc. etc.).
What's (not ha ha) "funny" about all these Michelle Obama and Oprah theories is that are coming almost exclusively from republicans. Democrats know full well that neither of them is interested.
But Newsom. Yes, he's ready should Biden drop out in some way.