The issue is whether federal law protects borrowers in foreclosure proceedings outside the court system.
The ruling was years in the making for right-to-work advocates and the court’s conservative wing.
It’s a defeat for Discover, which said the rules undercut its ability to compete with American Express.
The court sided with states and traditional retailers on a 5-4 vote.
Raymond Lucia, of "Buckets of Money" fame, is entitled to a new trial, the court ruled.
The issue is whether false statements are enough to hold someone liable for a fraudulent scheme.
The justices rejected arguments from scouts who claimed the 30 teams were colluding to suppress wages.
The ruling builds on previous Supreme Court decisions that let companies channel disputes into arbitration.
Nevada is the only state where single-game wagering is now legal.
With Trump support, he says the SEC's judge who handled his case was appointed in violation of the Constitution.