From the abstract to Presidential Norms and Article II, 131 Harv. L. Rev. 218 (2018), by Daphna Renan:
The nature of the presidency cannot be understood without reference to norms. The written provisions of our constitutional structure do not, by themselves, offer a sufficiently thick network of understandings to create a workable government. Rather, those understandings are supplied by norm-governed practices. Presidential power is both augmented and constrained by these unwritten rules. This Article offers a sustained account of the norm-based presidency. It maps out the types of norms that structure the presidency and excavates the constitutional functions that these norms serve, the substantive commitments that they supply, the decisional arenas where they apply, and the conditions that make some norms (relative to others) more or less fragile. Understanding these characteristics of an unwritten Article II helps to mark abnormal presidential behavior when it arises. It also brings into view core features of structural constitutionalism itself. Norms simultaneously settle constitutional duty for a time and orient contestation over what legitimate practice should be. Norms, however, cannot be understood in contrast to a fixed constitutional structure. Rather, norms bring into view the provisional nature of our constitutional order itself.