In America, the wide-eyed and innocent believe in unicorns and the Tooth Fairy. In Massachusetts, they believe in “coincidence.” For 10 years a Lowell woman had been getting her welfare benefits at the local office without, she claims, being asked to register to vote. She never bothered to do anything about it until now. What a “coincidence.” So a group headed, “coincidentally,” by Elizabeth Warren’s daughter Amelia files a lawsuit on this woman’s behalf. Now, Demos has filed other such lawsuits in other states and in other years. But the one they filed against Massachusetts just happens to be while...