'America Alone' on the Iran Nuclear Deal?

Does President Trump's decision to withdraw from the Iran nuclear deal mean "America first" or "America alone"? What will be the immediate and long range implications?  Robert Litwak, Senior Vice President and Director of International Security Studies at the Wilson Center, provides analysis in this edition of TRENDING.

Guest:
Robert S. Litwak, Senior Vice President and Director of International Security Studies at the Wilson Center, is one of the world’s preeminent experts on nuclear issues and policy, from Iran to North Korea to Russia. A consultant to the Los Alamos National Laboratory, he served on the National Security Council as Director for Nonproliferation. The author of pathbreaking books on “rogue states,” Litwak regularly briefs U.S. lawmakers, is frequently quoted in leading media outlets, and has held visiting fellowships at Harvard, Oxford, and the Russian Academy of Sciences.