He added that the A.M.A. is not necessarily opposed to a public option, and I have the impression that it might accept a pallid one built on co-ops. Dr. Rohack wouldn’t repudiate his association’s letter to the Senate Finance Committee warning against a new public plan. That letter declared: “The introduction of a new public plan threatens to restrict patient choice by driving out private insurers.”

Image Nicholas D. Kristof Credit... Fred R. Conrad/The New York Times

I don’t mind the A.M.A. lobbying on behalf of doctors in the many areas where physicians and patients have common interests. The association is dead right, for example, in calling for curbs on lawsuits, which raise medical costs for everyone.

An excellent study published in 2006 in The New England Journal of Medicine found that for every dollar paid in compensation as a result of lawsuits against doctors, 54 cents goes to legal and administrative costs.

That’s an absurd waste of money. Moreover, aggressive law leads to defensive medicine, in the form of extra medical tests that waste everybody’s money. Tort reform should be a part of health reform.

Yet when the A.M.A. uses its lobbying muscle to oppose major health reform  yet again!  that feels like a betrayal. Doctors work hard to keep us healthy when we’re in their offices, and that’s why they win our trust and admiration  yet the A.M.A.’s lobbying has sometimes undermined the health of the very patients whom the doctors have sworn to uphold.

I might expect the American Association of Used Car Dealers to focus exclusively on wallet-fattening, but we expect better of physicians.

In fairness, most physicians expect better as well, which is why the A.M.A. is on the decline.

“It’s what has led to the decline of the A.M.A. over the last half century,” said Dr. David Himmelstein, a Massachusetts physician who also teaches at Harvard Medical School. “At this point only one in five practicing doctors are in the A.M.A., and even among its members about half disagree with its policies.” To back that last point, Dr. Himmelstein pointed to surveys showing a surprising number of A.M.A. members who support a single-payer system.