IT IS Election Night, 2012. The polls have closed. State by state, the votes are being counted, and gradually it becomes clear, to the bottomless horror of some voters and the unbridled delight of others, that Sarah Palin, the Republican presidential nominee, has bested President Barack Obama in the popular vote nationwide. In Massachusetts, where Obama crushed Palin in a 79 percent landslide — the most lopsidedly anti-Palin vote of any state — “bottomless horror’’ doesn’t begin to describe the political reaction. For in 2010, Massachusetts joined the National Popular Vote compact, making a commitment to cast all of its...