From the article:
That Mr. Obama's mandate is limited to kids has led to a primary catfight that runs back several months, and Mrs. Clinton is pressing the issue especially hard now to attract liberals who think Mr. Obama is the better bet for "change." She said on Saturday that Mr. Obama "proposed a health-care plan that doesn't cover everybody." Mr. Obama counters that the reason many people aren't insured is because they can't afford it. Supposedly he is "echoing right-wing talking points," but he is more accurately echoing reality.