MILAN — Elly Schlein, a 37-year-old U.S.-Italian national and longtime left-wing political operative who worked on two presidential campaigns for former U.S. President Barack Obama, defied polls to become the first woman to head Italy’s opposition Democratic Party. Schlein’s surprise victory Sunday over the popular governor of Emilia-Romagna, a traditional left-wing stronghold, is attributed to support from women and youth …
