Not so much demonic as phoney, forced and employed as a time-buying tactic; used to appear relaxed and natural (although it achieves neither). Like everything else about this power-hungry, vicious political animal it is insincere. Fake laughter, fake tears, fake marriage, fake experience...
Maybe that "disarmingly beautiful" bit will get you a date with a surrogate Hillary, even if you're really not interested in humping your political mater.