Alcohol regulations in Illinois and across the country are up for debate at the nation’s top court.The U.S. Supreme Court is set to decide whether forcing retailers to live in a state before they get licensed to sell liquor there is illegal protectionism or a hallmark of the post-Prohibition Era.An opinion could come any time before the justices end their session in June.The dispute arose when a national chain, Total Wine, challenged a Tennessee law that requires prospective liquor sellers live there at least two …