When Mitch Stewart first became a field organizer, in 2002, it looked like the most anachronistic job a young man could seek out in a 21st-century campaign: managing and training volunteers for the work of phone banks and door knocks. At that point, the glamour job in politics was making ads. But now, with big data at the center of modern campaigns, the game is different. CONT.
Sasha Issenberg, Bloomberg Politics