By the end of 2017, it may have seemed like there weren’t any political or diplomatic precedents left to break. Nonetheless, the Trump Administration managed to break one more in November at the United Nations Climate Change Conference in Bonn, Germany, when it declined to establish a pavilion space for American diplomats, NGOs, and business leaders to gather. Instead, there was an unofficial American pavilion, featuring California Governor Jerry Brown and former New York City Mayor Michael Bloo…