These days it’s hard to pick up a newspaper or turn on a news program without encountering stern warnings about the federal budget deficit. The deficit threatens economic recovery, we’re told; it puts American economic stability at risk; it will undermine our influence in the world. These claims generally aren’t stated as opinions, as views held by some analysts but disputed by others. Instead, they’re reported as if they were facts, plain and simple.

Yet they aren’t facts. Many economists take a much calmer view of budget deficits than anything you’ll see on TV. Nor do investors seem unduly concerned: U.S. government bonds continue to find ready buyers, even at historically low interest rates. The long-run budget outlook is problematic, but short-term deficits aren’t  and even the long-term outlook is much less frightening than the public is being led to believe.

So why the sudden ubiquity of deficit scare stories? It isn’t being driven by any actual news. It has been obvious for at least a year that the U.S. government would face an extended period of large deficits, and projections of those deficits haven’t changed much since last summer. Yet the drumbeat of dire fiscal warnings has grown vastly louder.

To me  and I’m not alone in this  the sudden outbreak of deficit hysteria brings back memories of the groupthink that took hold during the run-up to the Iraq war. Now, as then, dubious allegations, not backed by hard evidence, are being reported as if they have been established beyond a shadow of a doubt. Now, as then, much of the political and media establishments have bought into the notion that we must take drastic action quickly, even though there hasn’t been any new information to justify this sudden urgency. Now, as then, those who challenge the prevailing narrative, no matter how strong their case and no matter how solid their background, are being marginalized.