“In a second term,” Mitt Romney darkly warned members of the National Rifle Association last month, President Obama “would be unrestrained by the demands of reelection.” But Romney was cagey about what, exactly, that would mean: His only specific prediction was that Obama would “remake” the Supreme Court. So it was helpful when, at the White House Correspondents’ Association Dinner a week ago, the president opened up about the “secret agenda” he has planned.