European foreign policy chief, Federica Mogherini, said on Tuesday she is confident the United States would stick to the 2015 Iran nuclear deal, despite its protestations to the contrary, because the agreement is working. "I am confident that the review in the US will bring wise decisions, which means keeping something that is working," she told a news briefing on the margins of a peace mediation conference in Oslo, Reuters reported. "In any case the European Union will guarantee that the deal keeps, that we stick to that ... and that our policy of engagement with Iran continues." Foreign Minister Mohammad Javad Zarif also said Monday the Donald Trump administration will end up abiding by the nuclear agreement. "We believe that at the end of the day they will find it necessary to abide by the deal." I believe the US administration will find it in the interest of the US, as well as the interest of international peace and security, to live up to its commitments."