ecret diplomacy has a special place in the annals of American history. Henry Kissinger's furtive trip to China has been acclaimed as the quintessence of diplomacy. The Obama administration, steeped in its own brand of realism, is another devotee of secret talks, meeting with Iranian officials in Oman and Cuban functionaries in less-exotic Canada. Richard Nixon and Barack Obama are probably the two presidents with the greatest affinity for surreptitious maneuverings. Such practitioners of clandestine diplomacy believe that revolutionaries are, behind the curtains, just waiting to offer concessions: Once ensconced in hideaways with their American counterparts, the revolutionaries' essential pragmatism will reveal itself. The actual track record for such secret talks, however, shows that the revolutionaries inevitably gain the high ground. Washington ends up abandoning its sensible red lines and often betraying its longstanding allies.