Personality has determined the winner of the last twenty-two U.S. presidential elections--and it will decide who wins in 2020. "The Greeks had a word for it 'Charisma.' In the theatre we call it 'Stage Presence.' JFK had it, so did Ronald Reagan and Barack Obama. Nixon did not. The jury is still out on whether Donald Trump can be saved by his own version. Merrick has put together an excellent guide to understanding politics and human...