Even before an agreement was reached in Paris, some members of Congress expressed opposition to both the COP21, and the Obama administration’s approach to negotiations. It remains to be seen whether and to what extent Congress would cooperate in enacting legislation aimed at achieving the summit’s agenda. However, the Paris agreement is not a treaty; accordingly, it will not have a binding effect on all future presidents, and subsequent administrations may back away from the commitments made in Paris by the current administration. Consequently, the long-term durability of the Paris agreement in the U.S. will largely depend on national will and international pressure