President Obama's speech in defense of his Iran nuclear deal at American University in Iran is about what you would expect. A liberal dose of demagoguery populated by straw men and engagement in moral equivalency.
His main argument was that the people who opposed the Iran nuclear deal supported the War in Iraq as if the two were mutually exclusive.
As usual he resorted to outright distortions and misrepresentation of the views of his critics as was the case with the interim deal:
Now, let me pause here just to remind everybody that when the interim deal was announced, critics -- the same critics we’re hearing from now -- called it “a historic mistake.” They insisted Iran would ignore its obligations. They warned that sanctions would unravel. They warned that Iran would receive a windfall to support terrorism.