NEW YORK – Mr Zohran Mamdani, the young upstart of the US left, was sworn in on Jan 1 to take over as New York mayor for a term sure to see him cross swords with President Donald Trump.

After the clocks struck midnight, bringing in 2026, Mr Mamdani took his oath of office at an abandoned subway stop to begin managing the United States’ largest city. He is New York’s first Muslim mayor.