To combat underage binge drinking, the national legal drinking age should be lowered to 18, a former college president is saying. Since releasing a 250-page study on the societal effects of modern drinking laws, Middlebury College President emeritus John McCardell has campaigned across the country calling for states to lower the legal drinking age to 18 because he observed fewer alcohol-related problems 30 years ago, when 18-year-olds could legally drink. "Before the law changed, it wasn't perfect," McCardell said. "But what you had then was out-in-the-open, intergenerational [drinking]." Since then, McCardell, who is launching the nonprofit group Choose Responsibility this...