Elsewhere on this site, Eric Posner argues that conservatives should celebrate President Obama’s immigration actions because they “may modify political norms that control what the president can do.” The idea, which will be familiar to everyone following the contretemps surrounding Obama’s immigration policy, is that Republicans will eventually be able to marshall the same powers Obama is asserting to more conservative ends.

But near the end of the article, Posner modifies his own argument by observing that Obama didn’t actually create any new norms last week at all. Rather, he may have revived a long-dormant conservative inclination to “undermine the regulatory system itself,” from within the executive branch, by pushing the envelope of executive power. We’ve already been down this road before—only before, Republicans were at the wheel.

This is a crucial insight. You can’t understand the shadowboxing over Obama’s immigration moves if you don’t recognize it as shadowboxing. To nearly a person, the conservatives complaining about the procedural implications of Obama’s actions are expressing substantive or political disapproval through other channels. The conservatives tenting their fingers, anticipating all the discretion a Republican president will use, would likewise have found reasons to support those acts of discretion whether Obama had acted unilaterally on immigration or not.

Two years ago, unilateral suspension of Obamacare requirements sat high on Mitt Romney’s 2012 agenda and Republicans loved it. They never considered it a threat to the right-size of the legislative branch, or worried that Mitt Romney was promising to exercise imperial powers.

Romney didn’t win, and thus his plan to dismantle Obamacare from within the executive branch never came to pass. But we don’t need to refer back to hypotheticals to expose the hollowness of precedential arguments like these. Three years ago, Mother Jones' Kevin Drum identified several real instances in which Republicans ”figured out that old traditions are just that: traditions. There’s no law that says you can’t change them.”