A.M. Edition for May 14. Two stocks at the heart of a pandemic-era trading craze are surging this week after a series of posts by an influential meme-stock guru. The WSJ’s Alex Frangos explains whether GameStop and AMC are experiencing a so-called “short squeeze,” and what that could mean for markets. Plus, President Biden unveils new China tariffs as U.S. trade policy takes center stage on the campaign trail. And OpenAI borrows from Hollywood’s vision of artificial intelligence as it launches its new voice assistant. Luke Vargas hosts. Sign up for the WSJ's free What's News newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices