When did obesity become a partisan issue?

Insinuations from her critics notwithstanding, Obama has not endorsed nanny-state or controversial remedies such as ending sugar subsidies, imposing soda-pop taxes or zoning McDonald’s out of certain neighborhoods. Instead, she is pushing for positive, voluntary change: more recess and physical activity, more playgrounds, more vegetable gardens, fresher food in schools and grocery stores, better education on the issue for parents and children.

All of this makes total sense, and historians will marvel (much as they will at climate-change deniers) that anyone could doubt it. The percentage of American adults who are obese more than doubled in the past 30 years, from 15 percent to 34 percent (with another 34 percent overweight); the share of obese children and teenagers more than tripled, from 5 percent to 17 percent. In fact, the astonishing acceleration of the epidemic (which may now have leveled off) might explain some of the skepticism; it takes a while for awareness to catch up to statistics.