WASHINGTON — An attempt to discredit new US congresswoman and leftist poster child Alexandria Ocasio-Cortez with a video of her dancing as a student backfired spectacularly, triggering eye rolls and a barrage of whimsical memes. The 30-second clip of a younger Ocasio-Cortez, now 29, strutting her stuff on the roof of a building quickly went viral on social media — but the troll attempt fell flat, with users rushing to praise rather than shame her. "Well, @AOC is officially done. She'll never recover from the world seeing her... (watches video) ...dancing adorably and having fun with her friends in high school?" tweeted the comedian Patton Oswalt, tongue-in-cheek. The edited clip that began circulating widely shows an upbeat Ocasio-Cortez twirling and hamming it up for the camera. "Here is America's favorite commie know-it-all acting like the clueless nitwit she is," read the original tweet from @AnonymousQ1776, who described it as a video from her high school days. The Twitterverse later unearthed the full video posted on YouTube eight years ago, when viral dance crazes began taking the Internet by storm. The trolling intended as a "gotcha" moment for the New York politician — who was sworn in to Congress Thursday, becoming the legislative body's youngest woman ever —instead saw social media turn the video into a comical meme. — AFP