While her husband may have paid lip service to ending the abuse of science for “politics or ideology,” first lady Michelle Obama gave herself a super-sized waiver. Two of her showcase social-engineering campaigns — tax preferences for breast-pumping working mothers and expanded nutrition labels — are based on distorting or dismissing the prevailing public-health literature. Just as the White House costumed Obamacare activists in white lab coats, the fashionable Mrs. ...