It was Hillary for so long, even after she lost the election and had no actual power. "Lock her up!". But that faded. Then the boogeyman became Comey. And then Strzok. And then Rosenstein. And then Muller. And then that woman that testified against Kavanaugh. Still, I think they had a hard time keeping up enthusiasm over those likes of those folks.
So they've run back to "momma", so to speak.
I've never liked her much. But I think the demonization by the populist right is over the top.