ANKARA: Iran´s president said on Sunday the United States had failed to undermine a nuclear deal between Tehran and major powers, and hailed the accord as a ?long-lasting victory? for Iran, state television reported. US President Donald Trump on Friday delivered an ultimatum to European sigNatories of the deal to fix the â??terrible flawsâ?* of the agreement with Iran, or the United States would pull out. ?The American administration has failed to undermine the nuclear deal . . . Trump, despite his repeated efforts, has failed to undermine the accord. The deal is a long-lasting victory for Iran,? President Hassan Rouhani said in a speech, broadcast live on state TV.