The following is a guest post by Carla Martinez Machain, Michael Allen, Michael E. Flynn, and Andrew Stravers. One week ago, National Security Adviser John Bolton appeared at a White House briefing holding a note pad with the phrase “5,000 troops to Colombia” written on it. This occurred in the context of rising tensions between the U.S. and the Maduro government in Venezuela after the U.S. recognized opposition leader Juan Guaidó as the...