Anthropic sits atop a pyramid of business partners and suppliers, making it a barometer of the broader economy. Its initial public offering will have widespread implications.

Democrats are targeting G.O.P. strongholds that could set them up for new majorities. But if they don’t win those races now, it could be a long time before they have another chance.

Scientists now know that they shared many of the sophisticated abilities of Homo sapiens. So why are we the only humans left standing?