“in the context of US politics, it reflects the will of a party that is likely to lose control of Congress in 2022. Even in the best-case scenario, it won’t hold Congress all the way through 2030. It can’t help but rely, for any 2030 goal, on some help from Republicans — which it can’t rely on and certainly can’t promise to the international community.”
https://www.vox.com/22401917/biden-climate-plan-summit-republicans-congress-midterm-elections