Both supporters and critics seem to agree that President Donald Trump broke new ground when he issued an executive order last year calling on government agencies to identify two existing regulations to eliminate for every new one they issue. Supporters see the President’s order as creating real incentives for agencies to eliminate unproductive, costly regulations. Critics see the order as an unprecedented presidential overreach. And yet, President Trump’s Executive Order 13,771 actually breaks little new ground in at least one important respect: it focuses on reducing the costs of existing regulations. The order simply extends a historical emphasis on using retrospective review to reduce regulatory costs—an important but severely limited g...