DEERFIELD, Ill. — Walgreens in March expanded Joseph Magnacca’s role. As president of daily living products and solutions, Magnacca — the former Shoppers Drug Mart vet who as chief merchant of Duane Reade proved instrumental in the reinvention of the New York drug store chain — will oversee Walgreens’ marketing and merchandising operations, led by chief marketing officer Kim Feil and chief merchandising officer Bryan Pugh, but will report directly to president and CEO Greg Wasson.