Last August, I wrote the following about Mitt Romney’s odds of winning the Republican nomination: In a sense, the stronger President Obama looks next year, the better Romney’s chances of being nominated. He needs the prospect of an uphill general-election battle to keep his potential rivals for establishment support safely on the sidelines. And then he needs that same establishment to rally around him once the primary voting starts — not out of love or admiration, but out of fear of the populist alternative. Six months later, this is almost exactly how things are playing out. In many ways, Romney...