Reasonable people can disagree whether sports gambling should be legal. But everyone who favors individual liberty should agree with the Supreme Court’s 7-2 decision on Monday in Murphy v. NCAA that the Constitution prevents Congress from giving orders to state legislatures.
Cultural mores regarding gambling have changed over the past century, and one of the last remaining taboos is against gambling on sports contests due to the opportunity for corrupting the competition. As more states legalized gambling, Congress in 1992...