How far can the euphoria over Alibaba Group Holding Ltd. go? Even by the standards of online retail, its rise has been extraordinary. Revenue has grown by an average 52 percent annually over the past five years. Its 158 billion yuan ($23 billion) of sales in the 12 months through March was more than 10 times the 2011 figure. Far …

The White House has called it a “revolution,” the “beginning of a new era,” and the “single most exciting thing we can do.” More modestly, you might just call it a pretty good idea. At an otherwise grim moment in Washington, that’s something to cheer. President Donald Trump announced a plan to turn the air-traffic control system over to a …

Leaders of the European Union are allowed a moment of joy at the outcome of the UK election. Britain’s voters have just handed the Conservative Party, author of the country’s Brexit disaster, its head. But the EU shouldn’t let the cosmic justice of this outcome cloud their judgment about where their own interests lie. The Brexit decision is unlikely to …