Come on; every body knows they could both suck start a B-52.
I’d guess at least one of them plays for the other team. As to dumbest? Clearly Harf. She presents herself as if SHE believes she the smartest one in the room, and doesn’t get phased when it’s pointed out how stupid her utterances really are (it’s just to “nuanced” for you rubes!).
With Psaki, you can see in her eyes that she know’s she’s lying, and she know’s that we know she’s lying - it’s just part of the game.