Most Republicans have just finished what might be called the spring of their discontent. Not much went right in the first half of the year; not much to cheer about. Let us count the ways that the world has conspired to help Mr. Romney. At a time when the Republican Party is straining to find new leaders, other prominent party members who aspire to that role -- Govs. Sarah Palin, Bobby Jindal and Mark Sanford, and Sen. John Ensign -- have stumbled or, in the case of Gov. Sanford, flamed out in spectacular fashion. Mitt Romney now looks by comparison...