President Obama’s brain trust on Afghanistan does not know much the U.S. spends on the war each year or the American cost in lost lives on the battlefield. This embarrassing lack of basic knowledge from State Department and Pentagon experts on Afghanistan at a House hearing Wednesday prompted even a Democrat to say he was stunned. The setting was the House Foreign Affairs Committee. The Issue: Afghanistan and the transition to fewer U.S. troops post-2014. The witnesses: James F. Dobbins, State’s special representative to Afghanistan and Pakistan; Donald Sampler, assistant to the administrator, U.S. Agency for International Development, which provides...