<h1>Regional immigration sweep reports about 400 arrests in under two weeks, raising Fourth and Fifth Amendment and civil rights concerns</h1> A federal immigration agency reports about 400 arrests in a regional enforcement initiative after less than two weeks, signaling a large-scale operation comparable to recent actions in other major cities. The campaign has prompted allegations of excessive force and overbroad sweeps that reportedly detained some U.S. citizens, raising likely constitutional and statutory issues including unlawful seizures, due process violations, and potential civil rights claims. Enforcement supporters view the operation as carrying out mass-removal policy priorities, while affected parties and civil rights advocates may pursue litigation and administrative challenges contesting tactics, detention criteria, and compliance with immigration and constitutional protections.