Ocasio-Cortez’s Twitter Baby Prattle: Twitter talk, often as not so much online baby prattle, is destined to come ricocheting back on rookie New York rep Alexandria Ocasio-Cortez who fired off a juvenile Twitter response: ‘New party, who dis?’ after 76-year-old Joe Lieberman made it known in a Fox Business Network interview that he feared her brand of high-tax socialism could doom the party’s chances for long-term dominance in Congress. When you’re 29-going-on18 and your critic is 76 years old, the pickings to go after him are easy.