28 U.S.C. § 1441(b)(2) is a statute that addresses the removal of cases from state court to federal court, specifically outlining the limitations on removal based on the citizenship of the parties involved. This section is crucial in determining whether a case can be removed when a defendant is a citizen of the state in which the action was brought, establishing a principle known as 'forum defendant rule'. Understanding this statute is essential for grasping how removal and remand processes operate in civil procedure.