It's just the natural progression. First they tried to ridicule her platform and label it as extreme but then quickly ditched that when they realized people like progressive planks like Medicare for All, raising the minimum wage, jobs guarantee, senior care, etc. and all they were doing was advertising that. Now they have moved onto just trying to paint her and other leftists as a morons who can't defend their positions, which has led to funny stuff like Shapiro offering to commit a felony, and other ****** status quo arguments like, "Clearly you have not considered the costs," and, "How many economic classes have you taken!?" when they can't think of a way to actually argue against their positions, as shown here:
They'll move onto saying she's a bigot against some group next in all likelihood, a la the smears against Corbyn.