(Reuters) – A divided Wisconsin Supreme Court ruled on Friday that the use of ballot drop boxes, which increased substantially during the coronavirus pandemic, is illegal under state law. In a 4-3 ruling, the court’s conservative majority also said voters cannot have other people return their completed ballots to a clerk’s office, a practice some voting groups employ to help voters but that conservatives deride as “ballot harvesting.” The decision ensures that drop boxes will not be in place for the state’s August primary election as well as November’s general election, when Democratic Governo…