DURHAM — The U.S. military is not just fighting wars in Iraq and Afghanistan, America’s most renowned investigative journalist says. The army is also “in a war against the White House — and they feel they have [President] Obama boxed in,” Pulitzer Prize-winning reporter Seymour Hersh told several hundred people in Duke University’s Page Auditorium on Tuesday night. “They think he’s weak and the wrong color. Yes, there’s racism in the Pentagon. We may not like to think that, but it’s true and we all know it.” In a speech on Obama’s foreign policy, Hersh, who uncovered the My Lai...