The Trump administration insists that its blabbermouth officials discussed no “war plans” or classified information in a chat group with a journalist. Our correspondent finds little to back up that claim, and explains the tricky legal and security questions the White House needs to answer.

Elsewhere, we examine “the book Meta doesn’t want you to read”. That is what the book’s publishers call it. Meta says the claims in its pages are old and untrue. But its attempt to deter readers is backfiring.