Constitutional Law – immigration — preemption

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Constitutional Law – immigration — preemption

Arizona’s immigration law is preempted by federal law.

By authorizing state and local officers to make warrantless arrests of certain aliens suspected of being removable, §6 too creates an obstacle to federal law. As a general rule, it is not a crime for a removable alien to remain in the United States. The federal scheme instructs when it is appropriate to arrest an alien during the removal process. The Attorney General in some circumstances will issue a warrant for trained federal immigration officers to execute. If no federal warrant has been issued, these officers have more limited authority. They may arrest an alien for being “in the United States in violation of any [immigration] law or regulation,” for example, but only where the alien “is likely to escape before a warrant can be obtained.” §1357(a)(2). Section 6 attempts to provide state officers with even greater arrest authority, which they could exercise with no instruction from the Federal Government. This is not the system Congress created. Federal law specifies limited circumstances in which state officers may perform an immigration officer’s functions. This includes instances where the Attorney General has granted that authority in a formal agreement with a state or local government. See, e.g., §1357(g)(1). Although federal law permits state officers to “cooperate with the Attorney General in the identification, apprehension, detention, or removal of aliens not lawfully present in the United States,” §1357(g)(10)(B), this does not encompass the unilateral decision to detain authorized by §6.
641 F. 3d 339, affirmed in part, reversed in part, and remanded.

11-182 Arizona v. U.S.

Kennedy, J.; Scalia, J., concurring in part and dissenting in part; Thomas, J., concurring in part and dissenting in part; Alito, J., concurring in part and dissenting in part.

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