On 19 July 2015, the US Department of State formally submitted the Iran nuclear sanctions deal to US Congress for review. This submission was required by a law that Congress adopted in May of this year. Under the law, Congress has 60 days from the submission date to pass a resolution of disapproval to prevent final approval of the agreement. President Obama has said he will veto any disapproval resolution if necessary. To override a presidential veto, each of the two houses of Congress would have to re-approve the resolution by at least a twothirds vote.