As a matter of basic civility, Barron Trump should be off-limits.
No matter what you think of his father, the kid is only ten years old. Even if Trump himself brings the boy up on stage, as he sometimes does, we should let the boy leave the spotlight untouched by public comment.
Democrats didn’t like the ugly speculation and insults that the children of presidents Obama, Clinton and Carter sometimes received. We shouldn’t tolerate any such treatment of Barron Trump.