Quotes herein were from interviews with historians in the Special Features “All The Way: A Walk Through History.” Some quotes from the main feature can be found in IMDb:
The relationship between black and white was at a fork. And coming into 1964, LBJ and MLK were on the right side of the fork.
He was all emotions on a spectrum of human experience. Everybody who knew him will say, “Bar none, there’s nobody more interesting that we’ve ever met in our whole lives.” You just couldn't take your eyes off him. He lit the room up when he entered, but nobody certainly expected him to be President.