Despite being the only country in the world to not be a part of the Paris climate accord, a coalition of more than 20 US states, more than 50 of its largest cities, and 60 businesses have committed to the previous emissions reduction goals of the US. Added together, they have an economic power of about $10tn, placing this group behind only the US as a whole and China in terms of GDP. At the Bonn conference on climate change, these groups joined together to make “America’s pledge” in stark opposition to the Trump administration.