"Climate change," writes Andrew Pendakis, "is not a box on a diplomatic checklist: it’s now the checklist itself." In this provocative essay, Pendakis argues that the increasingly aggressive posture of US policy towards China threatens to undermine the kind of radical and collaborative actions that the climate crisis demands. To have any hope of addressing the crisis, the United States must abandon xenophobic nationalism and adopt a much more open and cooperative position on China.