Why has health-care reform stalled in Congress? Democrats, after all, control both Houses, and President Obama, whose popularity remains high, has made universal health care his No. 1 priority. What's more, an overwhelming majority of the public wants it. In the most recent Wall Street Journal/NBC News poll, 76% of respondents said it was important that Americans have a choice between a public and private health-insurance plan. In last week's New York Times/CBSNews poll, 85% said they wanted major health-care reforms.

So why...