moscow russia say friday u.s. president donald trump choose certify deal iran nuclear program place international diplomacy aggressive rhetoric methods doom fail trump announcement underline inadmissibility use aggressive threaten rhetoric international relations russia foreign ministry say statement hangover past correspond modern norms civilize deal countries statement say view regret decision u.s. president confirm congress iran fulfil good faith nuclear deal statement say expect step direct effect progress implementation agreements although clearly correspond spirit letter nuclear deal iran strictly abide term deal agreement already make contribution make world safe add event regardless decisions individual party agreement possible return situation previously exist around iranian nuclear program statement say particular talk renewal sanction via u.n. security council russia remain commit ... iran nuclear deal want preserve continue fulfill obligations deal call participants ministry say russia say trump 's 'aggressive stance iran doom fail