Gah. Not hot on the idea of charging people. Americans do have the right to be conned by sociopathic, profoundly damaged orange con men. This is a profound sociological problem, not fixed with regulatory band aids.
While I'm not fond of over-litigation, some relief may be found through the courts, although that could also be considered a band aid. But at least it would be through existing legal means and not the establishment of new regs.
The Founders did not see this -- a literal group pathology -- coming, and they couldn't have. They tried to safeguard against tyrants, but this is just a different animal, so we're just not set up for a con of this size. And there's every chance he'll get away with it. There is no clear answer to this on the horizon.