This Copenhagen analysis by Steven Hill of the New America Foundation in the New York Times casts the US and President Obama as the chief obstacles to progress. Obama can’t deliver because of Senate opposition. Developing countries were justified to resist. For Europe to lead, it needs more effort from the US.

CITY TECH BLOG
The Impact of the Paris Climate Change Agreement in the United States
The United States, under the Obama administration, joined the Paris Agreement in 2015 and committed to reducing greenhouse gas emissions by 26-28% below 2005 levels by 2025. However, in June 2017, the Trump administration announced its intention to withdraw from the agreement (Shear). In April 2021, President Joe