This moment more or less speaks for itself. Cruz and Trump threw everything they could find on the floor at each other over the still-unanswered question of whether Cruz is a natural-born citizen.
Matt Taibbi summed it up well.
This is like watching two apes hurl feces at each other.
— Matt Taibbi (@mtaibbi) January 15, 2016
Except, these guys want to be the next President of the United States. Watching this spectacle just convinces me they need to go back to separate cages and learn some manners.