Author: 

John Bolton, former US Ambassador to the United Nations and foreign policy adviser to the Romney campaign

Additional author info: 

John Bolton is former US Ambassador to the United Nations and foreign policy adviser to the Romney campaign

John Bolton argues that Obama’s failure to exert power has left the US vulnerable

Obama during his 'off microphone' conversation with Dmitry Medvedev. Photo: Jewel Samad/AFP/Getty Images

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