TEHRAN: Iran dismissed a US offer to renegotiate a historic 2015 nuclear deal signed with other major powers as President Donald Trump reimposed crippling sanctions on Tuesday.Trump’s withdrawal from the agreement in May has infuriated European partners who were determined to keep it alive and now find their businesses operating in Iran faced with the threat of US legal penalties.The sanctions that went into effect on Tuesday target Iranian access to US banknotes and key economic sectors...