Even in an open convention, Gingrich wouldn't have a prayer of getting the nomination. But that seems to matter less to him than blowing up Mitt Romney. Gingrich no longer says he can capture the 1,144 delegates required to wrap up the Republican nomination. Instead, he now speaks frankly about a new plan: Keep Romney from getting to 1,144 by the end of the GOP primary season in June, and then start what Gingrich calls a "conversation" about who should be the Republican nominee. That conversation, the plan goes, would lead to a brokered GOP convention at which Gingrich would...