Inside the 3 days that remade the Democratic primary

WASHINGTON (AP) — At Mike Bloomberg’s midtown Manhattan campaign headquarters, a team of pollsters and analysts churned out multiple tranches of data each day on the state of the Democratic race. The sophisticated data operation was supposed to be the candidate’s not-so-secret weapon, giving Bloomberg an almost real-time look at voters’ preferences in key states and allowing the campaign to rapidly move around its vast resources.