Iran is a destabilizing actor in the Middle East; it must never be allowed to develop a nuclear weapon,” Biden told The Post. “What Iran is doing is dangerous, but still reversible. If Iran moves back into compliance with its nuclear obligations, I would reenter the JCPOA as a starting point to work alongside our allies in Europe and other world powers to extend the deal’s nuclear constraints. Doing so would provide a critical down payment to reestablish U.S. credibility, signaling to the world that America’s word and international commitments once again mean something. I would also leverage renewed international consensus around America’s Iran polic — and a redoubled commitment to diplomacy — to more effectively push back against Tehran’s other malign behavior in the region.