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 .
In June 2019 , the Trump administration announced new restrictions on American travel to Cuba.  In 2015 , the United States as a member of the P5+1 countries signed the Joint Comprehensive Plan of Action , an agreement aimed to slow the development of Iran 's nuclear program , though the U.S. withdrew from the deal in May 2018.. In the United States presidential election of 2016 , Republican Donald Trump was elected as the 45th president of the United States .
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