Sullivan described rejoining the Joint Comprehensive Plan of Action - which the government will negotiate next month with the UK, France, China, Russia and Germany - known as the P5 +1 - as a "key early priority". Some of the president's allies worry that Biden and his team may re-sign the deal too quickly, consider it a victory and then turn a blind eye to issues such as Iran's poor human rights record, its ballistic missile program and its attacks on the United States and the region. coalition forces.