David Brooks : criticism of Obama foreign policy has been on the increase . Hillary Clinton 's book mentions her disagreement with Obama on Syrian war . He says controversy over prisoner swap for Sgt . Bowe Bergdahl adds to the controversy . Zelizer says foreign policy can have effect on midterms , usually dominated by economic issues .
Julian Zelizer : Criticism of Obama foreign policy has been on the increase . Hillary Clinton 's book mentions her disagreement with Obama on Syrian rebels . He says debate over prisoner swap for Sgt . Bowe Bergdahl adds to the controversy . Zelizer says foreign policy can have effect on midterms , usually dominated by economic issues .