One of the first things U.S. Rep. Steve Kagen (D–Wisc.) did when he took office last year was to nix his congressional health care coverage. The move stunned a human resources staffer, who, the lawmaker says, looked at him as though he were insane.

"I'll respectfully decline until you can make that same offer for all of my constituents," he says he told her, explaining his decision to turn down what many say is the Cadillac of U.S. health plans.

Kagen, 58, is now one of millions of Americans, including at least nine million children, without health insurance. "I have absolutely no health coverage at all," he told ScientificAmerican.com during a recent interview. "I have no health conditions and am pretty darn healthy." And if he gets sick? "I'd be just like the 47 [million] to 50 million American citizens who don't have coverage,"