“The distinction matters, Harkinson argues, because the larger figure makes it appear that support for the Chamber’s positions—many of which Mother Jones opposes—is more broad-based than it really is. “The Chamber claims to speak for the U.S. business community,” he says, and the widespread use of the three million figure “certainly adds to” the impression that it does. But if many of those three million aren’t sustaining the Chamber financially or playing a role in setting its policies, how meaningful is the number? On Wednesday, Harkinson published an open letter to several reporters who had recently used the “three million” figure (sometimes with caveats or qualifiers), asking them to publish a correction.”