NEWYou can now listen to Fox News articles! Rep. Alexandria Ocasio-Cortez, D-N.Y., sparked social media backlash Friday after appearing to struggle with a journalist's question about whether the United States should commit troops to defend Taiwan against a potential Chinese invasion. While speaking during a town hall at the Munich Security Conference on Friday, Ocasio-Cortez was asked: "Would and should the U.S. actually commit U.S. troops to defend Taiwan if China were to move?" "Um, you know, I think that this is such a, you know, I think that this is a um — this is, of course, a, um,...