We don't want to live in a society, Hewitt nobly proclaimed, in which politically-correct thought police ban use of metaphors.
Now that's something which I, and I would bet any rational person, would strongly support. A world without metaphor would be dull and dismal and limited indeed - because, as Marshall McLuhan liked to say, punning on the poet Robert Browning, one's reach must exceed one's grasp, or what's a metaphor?
But Hewitt's proclamation is incomplete, to the point of being disingenuous. For surely Hewitt would agree that we must be free to criticize and denounce metaphors, when we find them dehumanizing. Surely Hewitt is not saying that sons of Presidential candidates, or anyone for that matter, should be able to tweet whatever they want in some kind of zone that protects them from scathing criticism?
As repulsive as so much of the Trump campaign has been, I would never advocate or even imply that he and his ilk should be silenced. I agree with Louis Brandeis that "the remedy to be applied [to falsehoods and fallacies] is more speech, not enforced silence". Surely that applies to demeaning metaphors.