Donald Trump’s appearance courtside at Madison Square Garden was supposed to be a historic moment, as, for the first time, a sitting president of the United States was attending an NBA Finals game.

Instead, his arrival became part of the story, drawing boos from sections of the crowd and triggering a massive security operation that reshaped the atmosphere around the storied New York arena on Monday night.

Trump watched from an executive suite as the New York Knicks hosted the San Antonio Spurs in a series that gripped the city and revived memories of the Knicks’ glory years.

When his image flashed up on the big screen during the national anthem, many fans jeered, underlining how sharply divided the country remains even in a space usually reserved for shared celebration.

Outside, Manhattan’s streets were locked down. Metal fencing, airport-style screening and a heavy Secret Service and police presence kept ticketless fans blocks away.

Long queues formed as supporters queued early, while others gathered at public viewing areas across the city.

Inside, however, the spectacle went on. Hollywood actors, musicians, former players and New York fixtures filled the front rows, turning the event into a star-studded night out.

Between the celebrity sightings, the political undertones and a tense 115-111 Spurs win, this was a New York basketball night unlike any other – on and off the court.