President Obama said Tuesday he had an obligation to secure the release of Army Sgt. Bowe Bergdahl, regardless of the circumstances surrounding Sgt. Bergdahl’s capture by the Taliban five years ago and despite claims he’s a “deserter” who walked away from his unit. Speaking at a news conference in Warsaw alongside Polish President Bronislaw Komorowski, Mr. Obama said he, like George Washington, Abraham Lincoln and FDR before him, must take every possible step to bring home American fighting men and women held in captivity at the end of a war. U.S. combat operations in Afghanistan will cease at the end...