Increasingly prosecutors are asked to consider immigration consequences in the charging and plea-bargaining process. Some states have adopted policies requiring prosecutors to consider such consequences, see, e.g., Cal. Pen. C. § 1016.3(b), and some prosecutor offices have adopted internal guidelines mandating the consideration of immigration consequences. This advisory provides context for why such a prosecutorial policy or practice is legally necessary and permitted, if not mandated, by constitutional law and governing codes of conduct.