As the Massachusetts blame game unfolds, the president’s unpopular health bill leads the list. But the substantive provisions of the bill were just part of the problem. Perhaps more important, voters were appalled by how the deal unfolded. Consider the pre-election giveaway to the labor unions. Negotiators agreed to exempt union contracts until 2018 from the tax on so-called Cadillac health-insurance plans. That backroom bargain not only outraged the voters, it also violated the Fifth Amendment to the Constitution, requiring the federal government to extend equal protection of the laws to all U.S. persons. Of course, not all voters...