It’s one rule for the President — and another for Cardi B . The rapper and singer, who performed at the New York Knicks versus San Antonio Spurs Game 3 of the NBA Finals Monday , showed off a $7,000 Chanel purse as she Instagrammed from celebrity row. This was despite the strict no-bag rule in place due to security measures around President Trump’s planned appearance at the game. And she wasn’t the only spectator with fashion in full bloom at The Garden. Court-side couture is causing almost as