Social media... Yes. But Trump has a Huey Long instinct over which he seems to have little control. He knows how to appeal to the aggrieved, the insecure, the marginalized. He knows instinctively those made to feel inferior and threatened  - the gun nuts, the bible thumpers, the displaced assembly line workers - by the "elites" , the feminists, the anti-gun lobby, the politically correct crowd,  CNN... You might say Trump knows all the "triggers", and, he's a master at using them.