Vivek Ramaswamy on the attack in 4th GOP debate
His attacks on fellow candidate Nikki Haley drew repeated boos from the crowd in attendance. WATCH the ABC News Live Stream Here: https://www.youtube.com/watch?v=w_Ma8oQLmSM SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News…