Back in September, Joe Biden described his Iran policy in an op-ed for CNN. After several paragraphs criticizing President Trump, Biden made an "unshakable commitment to prevent Iran from acquiring a nuclear weapon." Then he offered "Tehran a credible path back to diplomacy." The terms were simple. "If Iran returns to strict compliance with the nuclear deal," Biden wrote, "the United States would rejoin the agreement as a starting point for follow-on negotiations." And Biden is sticking with his plan. Recently Tom Friedman asked him if the offer stands. "It's going to be hard," Biden replied, "but yeah."