Hillary Clinton is running in a phantom race for the Senate, pitted against an unknown, unqualified opponent. In the unlikely event that New Yorkers ever learn what John Spencer’s views are, most would find them far too conservative. It’s a measure of the haplessness of Mr. Spencer’s campaign that the Republican nominee has been dogged by rumors that his real aim is to prepare the ground for an attempt to regain his old job as mayor of Yonkers.