On Tuesday, Twitter announced that a select group of users would be able to send 280-character tweets—double the platform’s signature 140-character limit. It’s part of an experiment testing whether longer character limits would be better for everyone. The company explained that, in languages where a single character carries more meaning—Chinese, Japanese and Korean—they see “more people tweeting—which is awesome!” If ...

Until now, the defining feature of the Trump administration’s trade policy has been a worrisome yet vague recklessness. The US Commerce Department’s new ruling on Boeing’s dispute with Bombardier, a Canadian aircraft maker, shows the harm that comes when the administration gets specific. The rules that regulate trade can’t work without restraint and a commitment to a liberal economic order. ...

Political pressure is gradually forcing Facebook executives to take responsibility for the content that appears on the social network, at this point mainly for the advertising. So far, they are doing a good job of avoiding the real subject. On Wednesday, Chief Operating Officer Sheryl Sandberg addressed the recent discovery that ads on Facebook could be targeted at “Jew haters”—or, ...