President Donald Trump was greeted with heavy booing at Madison Square Garden on Monday night as he attended Game 3 of the NBA Finals between the New York Knicks and the San Antonio Spurs.

President Donald Trump gestures during the National Anthem as he attends an NBA Finals playoff basketball game between the New York Knicks and the San Antonio Spurs.

The booing occurred when Trump was shown saluting on the big screen as the national anthem was being performed before the game.

Trump, who was invited to the game by Knicks owner James Dolan, was seated in the owner’s box over the court and he was joined in the box by interior secretary Doug Burgum, transportation secretary Sean Duffy and his granddaughter Kai Trump.

The president was shown on screen for several seconds and he appeared to have a smirk on his face despite the booing.