For some, opening day happened a few Sundays ago, when the NFL season began. For others, it’s in spring, when the long MLB season begins. For Supreme Court watchers, Oct. 3 is opening day. It will be a very impactful year when all the chips fall.Hearings next weekThe first case to be heard next Monday is Sackett v. EPA, with the question presented being whether the U.S. Court of Appeals for the 9th Circuit set forth the proper test for determining whether wetlands are “waters of the United States” under …