What on Earth is a Burden on Interstate Commerce?

What is a burden on interstate commerce? That’s an important question under the Dormant Commerce Clause’s Pike balancing test. But it’s a question whose answer has proven elusive. This shouldn’t be a surprise. After all, states disagree about what counts as a burden or a benefit, and how much weight each has. And there aren’t any obvious constitutional principles we can point to for resolving those disagreements. Recently, some scholars have tried to ground dormant commerce doctrine in economic cost–benefit analysis. The supposed virtue of that approach is that it is neutral as to competing preferences. Thus, for the Court to subject state laws to a cost–benefit test would preserve a kind of judicial neutrality that a bald evaluative assessment would not. But cost–benefit analysis isn’t nearly as neutral as its proponents assume. Indeed, it involves a controversial, and arguably misguided, evaluative outlook that we should be hesitant to constitutionalize under the Commerce Clause. Still, I claim that there may be a limited role for Pike balancing, or something like it, in a narrow range of cases involving functional kinds with an uncontroversial telos such as trains and trucks. But even there, we should avoid the unhelpful abstraction of a “burden on interstate commerce.” Could Pike be defended as a proxy for other constitutional values? I argue that Pike fails even that test. Thus, it is far past time to retire Pike.