How Clinton and Sanders avoided a broken convention

PHILADELPHIA — Late on the night before the Democratic National Convention kicked off, five Hillary Clinton and three Bernie Sanders aides huddled in a windowless room at the Wells Fargo Center and began working their way through a series of concerns scrawled on a whiteboard.
Among them: the possibility of disruptions from Sanders delegates at several points in the week — and the chance that Nina Turner, a fiery Sanders advocate, would be placed in nomination for vice president to em