In 2015 , the United States signed the Joint Comprehensive Plan of Action with the remaining P5+1 countries to slow Iran 's development of its nuclear program , but the Republican Donald Trump , who was elected as the 45th president of the United States in 2016 , withdrew from the agreement in mid-2018 , and he imposed travel restrictions on Cuba in mid-2019 .
The next year , the United States as a member of the P5
United States