Mamdani won a record-setting primary victory, and unions, grassroots Democratic groups, and savvy elected officials are rushing to back him. Now it’s the establishment’s turn.

Beyond his social media talent and approaches on affordability and Israel, Democratic voters have been inching to the left for years.

Mr Mamdani is a favourite to win the mayoral election in November, but has faced criticism for his anti-Israel stance that experts say will isolate Jewish voters and bankrupt the city. “Everything that I’ve read on him,