A Pennsylvania court struck down the state’s mail voting law Friday, saying the state Constitution requires voters cast ballots in person unless they meet specific requirements. That almost certainly won’t be the final word on the matter, as the state will likely appeal to the Pennsylvania Supreme Court, triggering an automatic stay of that decision and leaving Act 77 in place while the high court considers the case. And Democrats believe the Supreme Court, which has a Democratic majority, will ultimately uphold the law. Democrats had feared for months that the state’s Commonwealth Court, with its Republican majority, would strike...