Williamson supports rejoining the Joint Comprehensive Plan of Action (JCPOA). She said that "US propaganda ... falsely claims the deal lets Iran get nuclear weapons within 10 years." Williamson also backs increased diplomacy, a change of relations to address human rights in Iran, sanctions relief and the purchasing of Air Bus airplanes to support travel, entrepreneurship and normalization. According to Williamson, "Iran is a potential ally against Sunni extremism with many common interests to build upon". Williamson criticized the Trump administration for elevating tensions with Iran.