True. But the whole thing is just a handshake agreement in the first place. Obama never submitted to the Senate to be ratified as a treaty, which would be legally binding on us.
Heck, Obama never submitted the deal with Iran to be ratified as a treaty either. I would love to know how Obama was authorized to send a planeload of cash, actual currency from various countries, over to Iran as part of the deal.
Heck, so what if it were a treaty that actually WAS ratified by the Senate? My Choctaw folks have a lot of experience with signing a treaty with people in Washington, D.C. Not usually worth the paper it was written on.
The U.S. should just ignore the whole thing. Forget what Obama said or did and tell the Paris folks that things had changed.