Democrat Zohran Mamdani became New York City’s mayor on Thursday, vowing during a public swearing-in ceremony on the steps of City Hall to enact an aggressive agenda aimed at making the nation’s largest city more affordable for working people.Mamdani, a member of his party’s left-wing democratic socialist faction, was elected last November in a prominent victory that could this year’s midterm elections that will determine control of the US Congress. Some Democrats have embraced his style while Republicans portray him as a foil on the national political stage.For all the latest headlines follow our Google News channel online or via the app.The 34-year-old campaigned heavily on cost-of-living issues and was sharply critical of Republican President Donald Trump, whose approval rating has fallen over the past year amid economic concerns.Many of New York’s 8 million residents – some with hope, some with trepidation – expect him to be a disruptive political force. In a speech following his