It didn't matter what his military advisers said. It didn't matter what the inspectors said. It didn't matter what other foreign signatories said. Donald Trump was going to end the Iran nuclear deal and erase yet another legacy of the Barack Obama presidency. And he would find a way to do it, even if it meant discrediting any proponents of the deal, like those in Obama's State Department who finalized the negotiations or Trita Parsi, founder of the National Iranian American Council.