President Obama spoke Wednesday night as the pastor in chief, not as a politician. His address in Tucson was highly personal, rooted in the biographies of the victims and in scripture, more about the country as a family than about government. It was neither therapeutic nor political and dealt only in passing with the roiling controversies that have divided left from right.He spoke movingly about Rep. Gabrielle Giffords and her struggle for life. But the figure at the center of the speech, to who...