The Iran nuclear deal was a crowning moment of international diplomacy, allowing the world to step away from the edge of a self-created abyss. Donald Trump's decision to withdraw from this agreement threatens to return the world to that precipice. Dealbreaker recounts how this deal was made, why it was broken, and what the consequences of that action could be. The United States and its ally, Israel, pulled no punches, using diplomatic pressure to impose crippling economic sanctions, and covert activities to sow disinformation, sabotage equipment and murder Iranian nuclear scientists in an effort to stop the Iranian nuclear program from going forward. Iran prevailed, confronting the United States with the choice of either going to war, or accepting the reality of an Iranian nuclear program. The Iranian nuclear deal was the result. But the deal had an Achilles heel--the disinformation campaign waged by the United States and Israel to paint the Iranian program as military in nature left a residue of uncertainty and fear that the detractors of the deal used to attack it as little more than a sham. Donald Trump decried the Iranian nuclear deal as a "failed agreement" and promised to tear it up if he were elected President. Trump prevailed in the election, and ended up being as good as his word, pulling America out of the Iranian nuclear deal on May 12, 2018. Dealbreaker explores the nuances of the Iranian nuclear program, exposing the duplicity and hypocrisy of American diplomacy, supported by Israel and abetted by Europe, that led to the need for the Iranian nuclear deal and eventually caused the demise of an agreement that was simultaneously "the deal of the century" and claimed to be fatally flawed.