NEW YORK — Emmanuel Macron found himself at the mercy of New York traffic on Monday evening, after his car was held up by the motorcade of former U.S. President Donald J. Trump. The French president had just left the United Nations, where he had addressed the General Assembly and formally recognised the State of Palestine. But as his convoy turned onto First Avenue, it ran straight into Mr Trump’s security lockdown. I’m stuck in the street because everything’s blocked for you,” Mr Macron told him, half-joking. Neither the Élysée Palace nor Mr Trump’s team commented further on the incident.