I don’t think they have a legal case, but Hillary most certainly is a scumbag. She ought to drop to her knees and beg for their forgiveness.
“I don’t think they have a legal case...”
I’m not sure they have one via they avenue they are pursuing, but anyone can sue anyone for “emotional distress”, so they certainly could make a case that her lies about their child’s death caused them that.
Just find a cause to sue her, doesn’t matter what it is, the important thing is to get a deposition out of her under oath and on the record. If she lies, it’s perjury. If she tells the truth, she conflicts her previous statements and everyone will know she was lying for years to the American public. Win-win.