In the United States, anyone with an education knows the U.S. Supreme Court defines Constitutional law. Unchanged since 1803. Comprehensive reading, it's free. Disparaging way? You may call it education, but that's not what it "IS."

"But when the legislature proceeds to impose on that officer other duties; when he is directed peremptorily to perform certain acts; when the rights of individuals are dependent on the performance of those acts; he is so far the officer of the law; is amenable to the laws for his conduct; and cannot at his discretion sport away the vested rights of others...

http://www.ourdocuments.gov/doc.php?flash=false&doc=19&page=transcript