As Obama sought to strike the appropriate tone Monday, he appeared to be trapped between the need, as president and commander in chief, to stand up for the government's right to ensure law and order, and the inclination, as an African-American, to empathize with those whose say the killing of an unarmed black man just goes to show how blacks are treated differently by police. "In too many communities around the country, a gulf of mistrust exists between local residents and law enforcement. In too many communities, too many young men of color are left behind and seen only as...