A ruling in the latest Supreme Court challenge to the Affordable Care Act is likely this month, and local consumers, businesses and government are bracing for the potential fallout if the verdict goes against the federal health law. The case hinges on whether a clause in the law prohibits tax subsidies for patients insured through the online federal marketplace who live in states that do not operate their own health care exchanges. Thirty-seven states, including Georgia, declined to open and operate their own health insurance marketplace.