Iran is warning that it may resume production on its nuclear program, reviving a crisis that had been contained by the signing of the Iran nuclear deal four years ago. One man within the United States government may have intentionally brought us to this point. Guest: Mark Landler, who covers the White House for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily. Background reading: After President Hassan Rouhani of Iran declared that he would begin to walk away from the terms of the nuclear deal, the Trump administration responded with a new round of sanctions.The lack of ideological coherence in President Trump’s approach to foreign intervention has played to the advantage of more hawkish advisers.