Democrats have a hard task as the hearings’ public stage proceeds: not uncovering new evidence, but building a robust public case for impeachment. The online-grocery business is tough—but that isn’t stopping e-commerce players big and small from trying to crack it. And it’s getting harder for artists to hang around on the album charts; new talent is coming in, and heading out, ever faster. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer