Ari Melber of NBC News
When Donald Trump and Hillary Clinton face off for their first debate on Monday, a strict set of rules are designed to govern the event. Besides the candidates themselves, however, virtually no one actually knows what the rules say.
It’s a curious tradition in general election debates: The candidates’ top strategists negotiate written rules and keep them a closely guarded secret.
Those rules range from the trivial, such as how the candidates enter the room….