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. But not Mitt Romney. For this unsuccessful 2008 Republican presidential contender, it is hard to imagine how events could be moving more decisively in his favor in 2009. One can almost hear him wondering: Why didn't things break this way last year? 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...