The biden administration is NOT a duumvirate between biden and harris. It is really administration by a committee of shadow “presidents”—i.e., a Politburo!!!!
Besides that, the “vir” in “duumvirate” means “man”. harris is a woman. So there is no duumvirate whatsoever!!!!
Then it's possibly a DUUMVAGRATE?............
Would Harris be a dumbvirago?