Not a megalomaniac but a committed Marxist and Marxists are megalomaniac in their pursuit of power to change society. You were almost right.
Zero had one attribute that saved us, he is fundamentally lazy to his very core! He was no 7X24 revolutionary like Lenin or Trotsky. He wasn’t even a 9 to 5 or even a banker’s hours revolutionary! The revolution didn’t take precedent over his golf game or vacations. I bet Zero’s lack of revolutionary fervor drove Bill Ayres crazy! That might explain all the WH visits.
Also leftists and most Rats fundamentally don’t understand how diffuse power is in America. So what protected Zero from close examination also prevented him fully exercising power. Thanks Founding Father! Again so wise in so many ways!