UNITED NEWS INTERNATIONAL (UNI) — In a landmark decision, the U.S. Supreme Court struck down a federal law that banned sports betting in almost every state, opening the door to legalized sports gambling nationwide.

The 1992 Professional and Amateur Sports Protection Act, or PASPA, barred states from legalizing betting on athletic events on the grounds that it would preserve the integrity of sports.

Nevada was grandfathered in, effectively awarding the state a monopoly.

Former New Jersey governor Chris Christie challenged to the law in 2010, claiming that it violated the Tenth Amendment.

In a 6-3 ruling on May 14, the Supreme Court said that PASPA violated states’ rights to make their own decisions.

The ruling is a win for Christie and other proponents, who believe it will bring nearly $150 billion a year spent on illegal sports gambling out of the shadows.

It’s a defeat for the NCAA and the four major professional sports leagues, which had successfully blocked New Jersey in lower courts.