who has to ratify a treaty made by the president
Treaty Clause Throughout U.S. history, the President has also made international "agreements" through congressional-executive agreements (CEAs) that are ratified with only a majority from both houses of Congress, or sole-executive agreements made by the President alone.[1] Though the Constitution does not expressly provide for any alternative to the Article II treaty procedure, Article I, Section 10 of the Constitution does distinguish between treaties (which states are forbidden to make) and agreements (which states may make with the consent of Congress).[3] The Supreme Court of the United States has considered congressional-executive and sole-executive agreements to be valid, and they have been common throughout American history. Thomas Jefferson explained that the Article II treaty procedure is not necessary when there is no long-term commitment:
Kyoto Protocol As of 2016, the US is the only signatory that has not ratified the Protocol.[98] The US accounted for 36% of emissions in 1990. As such, for the treaty to go into legal effect without US ratification, it would require a coalition including the EU, Russia, Japan, and small parties. A deal, without the US Administration, was reached in the Bonn climate talks (COP-6.5), held in 2001.[99]