Faye files a suit in a state court against gas station stop, claiming employment discrimination. gas station loses the suit and appeals. after the state's highest court's review of faye v. gas station stop, either party can appeal the decision to the united states supreme court if

Either party can appeal if the law practice in question is in any way connected to a breach of the federal law as perceived by one of the sides. If it's not connected to federal law then it cannot be appealed at the supreme court because local state issues that are not related to the federal law are only resolved by state circuit and appellate courts.