AP Billionaire David Tepper’s Appaloosa LP made a strongly-worded call for change to drugmaker Allergan’s board leadership structure on Tuesday. Appaloosa wants Allergan’s board to separate the role of chairman and CEO, which today are both held by Allergan’s Brent Saunders. In a Tuesday letter, Appaloosa slammed Allergan’s executive decision-making, "the record for which has […]