Why this four-second AOC-Mamdani clip sparked a debate

A four-second clip of Rep. Alexandria Ocasio-Cortez (D- NY) and New York City Mayor Zohran Mamdani smiling as they greeted each other during the 9/11 anniversary ceremony drew criticism from some Republicans. An extended clip of that moment shows Mamdani standing with a solemn expression as the names of the attack victims are called before briefly greeting the congresswoman.