By then, Mook was in all but open warfare with Podesta. For starters, their vastly different styles clashed time and again. Mook, with his field-organizing roots and millennial viewpoints, was part manager, part dreamer, part salesman, and part cheerleader. Podesta was more grounded, direct, and pessimistic. He was also furious at Mook for cutting him out of the information loop on major parts of the campaign, including budgets, analytics data, and staffing in the states.