For the convenience of readers, here is a collection of the links. Dorf's post is here. Here are the links to the four parts of my reply:
Part One, Concepts and Terminology
Part Two: Public Meaning and Underdetermination
Robert L. Tsai: America's Forgotten Constitutions: Defiant Visions of Power and Community
Stuart Chinn: Recalibrating Reform: The Limits of Political Change
Michael E. Bratman: Shared Agency: A Planning Theory of Acting Together
edited by Christopher J. Peters: Precedent in the United States Supreme Court
Daniel R. Ernst: Tocqueville's Nightmare: The Administrative State Emerges in America, 1900-1940
H. Jefferson Powell: The President as Commander in Chief: An Essay in Constitutional Vision