Why Can’t the Washington Post Keep Circulation Up? Here’s an unsolved mystery: Why is the Washington Post losing readers while USA Today, the New York Times, and the Boston Globe are gaining them—and while the Washington region’s population is booming with college graduates? “We can guess, we can speculate, we can estimate,” says executive editor Len Downie Jr. But the Post doesn’t know, which has its top people wringing their hands in regular meetings. A year ago the Post’s average daily circulation was 796,367. Recent figures put it at 772,553, a drop of some 24,000 readers, or 3 percent. “Theoretically,...