In essence, constitutionalism is the intellectual counterpart and spiritual progeny of the “originalism” movement in jurisprudence. Judicial “originalists” (led by Antonin Scalia and other notable conservative jurists) insist that legal interpretation be bound by the text of the Constitution as understood by those who wrote it and their contemporaries. Originalism has grown to become the major challenger to the liberal “living Constitution” school, under which high courts are channelers of the spirit of the age, free to create new constitutional principles accordingly.

What originalism is to jurisprudence, constitutionalism is to governance: a call for restraint rooted in constitutional text. Constitutionalism as a political philosophy represents a reformed, self-regulating conservatism that bases its call for minimalist government – for reining in the willfulness of presidents and legislatures – in the words and meaning of the Constitution.

Hence that highly symbolic moment on Thursday when the 112th House of Representatives opened with a reading of the Constitution. Remarkably, this had never been done before – perhaps because it had never been so needed. The reading reflected the feeling, expressed powerfully in the last election, that we had moved far, especially the past two years, from a government constitutionally limited by its enumerated powers to a government constrained only by its perception of social need.