In the debate over U.S. immigration, all sides now support policy and practice that expand the parameters of enforcement. While immigration control forces lobby for intensifying enforcement for reasons that are transparently connected to their policy agenda, and pro-immigration forces favor the liberalization of migrant flows and more fluid labor market regulation, these transformations, meant to grow global trade and commerce networks, also enlarge the extralegal (or marginally legal) discretionary powers of the state and encourage a more enforcement-heavy governing agenda. Philip.