My opponents in this race, all four of them, pledged to maintain that Iranian nuclear deal. One of them says he’ll renegotiate it. Well let me be very clear, as President, on the very first day in office I will rip to shreds this catastrophic Iranian nuclear deal.
If you feel a sense of despair — can we keep America safe after seven years of receding from the world? — it is worth remembering that foreign policy, perhaps, can change the fastest. That in January, 1981, this same nation, the nation of Iran, released our hostages the day Ronald Reagan was sworn into office. That’s the difference a strong Commander-In-Chief can make and that is the difference I, as President, will make unequivocally clear to Iran — either they will shut down their nuclear program or we will shut it down for them...............
The time for weakness and appeasement is over.
see interview here