France's Macron visits Trump as Iran nuclear deal hangs in balance

U.S. President Donald Trump and first lady Melania Trump and French President Emmanuel Macron and Brigitte Macron have their picture taken on a visit to the estate of the first U.S. President George Washington in Mount Vernon, Virginia outside Washington, U.S., April 23, 2018. REUTERS/Jonathan Ernst

MOUNT VERNON, Va./WASHINGTON (Reuters) - U.S. President Donald Trump and French President Emmanuel Macron emphasized pomp and ceremony on Monday as Macron began a state visit to Washington likely to be dominated by differences with the United States over trade and the nuclear accord with Iran.

As Macron headed to the United States, the Iranian government urged European leaders to convince Trump not to tear up the 2015 deal between Tehran and six world powers.