[Bob434]

Someone should confront her publicly and say to her and the audience something like

“what you just stated is so far from the truth that you should be truly ashamed for trying to foist auch a lie on the public. Either that or your ignorance knows no bounds - so which is it?”

[glennaro]

Even that would likely have little effect.
As Dennis Prager has noted, the Left lacks any sense of introspection; they condemn others for what they say and do, refusing to recognize that it applies to them as well ... often even moreso.