Bernie Sanders only has one issue. The pundits have been telling us so all along, and the Vermont senator even admitted it himself during the last Democratic debate. “[Former] Secretary [of State Hillary] Clinton says I’m a one-issue person—well, I guess so,” said Sanders, after months of dancing around the accusation. “My one issue is trying to rebuild a disappearing middle class. That’s my one issue.”

It appears his confession didn’t hurt him in Michigan, where he pulled off a remarkable come-from-behind upset against Clinton on Tuesday. And looking ahead to other industrial Midwestern states in the March 15 contest, there are definitely worse things to be than an obsessive class crusader. Some campaigns spend an entire election searching for the strong, consistent message that Sanders, for better or worse, has deployed since the start of this race. Why not own a perception you’re going to get tagged with anyway?

But from a policy standpoint, this is all complete nonsense. Set aside the fact that Sanders has indeed put forward detailed plans on everything from immigration to climate change. It takes a certain kind of myopia to relegate an economic platform as ambitious and multi-faceted as Sanders’s to the status of “single issue.” Rebuilding the middle class, under Sanders, would entail nothing less than correcting half a century of macroeconomic policy. Would that it were so simple.

A more accurate version of the “one issue” criticism would be that Sanders has fixated on the domestic, largely to the exclusion of global affairs. Given Clinton’s diplomatic resume, this is probably closer to the contrast her camp originally intended to draw. Here, Sanders has indeed been a disappointment. He changes the subject whenever possible and stumbles through vague, sometimes painfully bad answers when he can’t. His most compelling moments have come when he has tied Clinton’s interventionist streak to a broader critique of U.S. transgressions past. Still, the very framing of his preferred attack—extolling the virtues of “judgment” over “experience”—concedes that Clinton’s time in office is meritorious; her errors reflect flawed personal decision-making, not a fundamentally objectionable worldview.

Sanders, in that sense, has not only missed an opportunity to score points with a Democratic electorate well to Clinton’s left on matters of statecraft, but also deprived the country of a more profound debate as to the nature and purpose of U.S. military might.