在此背景下，委员会应该知道它企图联手奥巴马的共和党反对者阻止达成伊朗核协议（奥巴马最重要的成就之一）将不会成功。
Against this background, AIPAC should have known that its attempt, in close cooperation with Obama’s Republican opponents, to block the Iran nuclear deal (one of Obama’s most important achievements) would fail.