The national health insurance legislation, colloquially known as “ObamaCare,” passed recently by the U.S. Congress and signed by President Obama is historic. However, almost as soon as it became law, several pundits, journalists and lawmakers – as well as law suits filed by the attorney generals from 18 states – began asking the same question: is ObamaCare constitutional? “If you are looking for a specific clause in the Constitution that explicitly authorizes the national government to regulate the subject of health care, then the answer is obviously no,” says John Finn, professor of government, who has written and commented widely…