A federal judge on July 2 temporarily blocked Philadelphia from enforcing a city measure aimed at federal immigration operations, preventing the city from requiring federal officers to go unmasked, display visible identification, and use marked vehicles during enforcement activity. The ruling is an early but important development in a fast-evolving conflict between local efforts to regulate immigration tactics and the federal government’s claim to operational control over its officers.

At the center of the dispute is a familiar constitutional fault line: whether a municipality can impose rules that affect how federal officers carry out federal law.

The Second Circuit has handed New York City and New York State a major appellate win, ruling that they may enforce measures that effectively bar fossil-fuel appliances in newly constructed buildings. The decision is important well beyond New York: it sharpens a growing disagreement among federal appeals courts over whether local and state building-electrification laws are preempted by federal energy-efficiency statutes.

At the center of the dispute were challenges by trade groups and unions arguing that the city and state restrictions unlawfully intrude on an area governed by federal law, particularly the Energy Policy and Conservation Act.

The U.S. Department of Justice has opened a consequential new front in the federal-state debate over immigration and public benefits, suing New Jersey over state laws that allow undocumented students to qualify for in-state tuition and state financial assistance at public colleges and universities. The complaint tees up a challenge with both preemption and constitutional dimensions, and it is likely to draw close attention from states, higher-education institutions, and practitioners watching the boundaries of state authority in immigration-adjacent policymaking.

At issue are New Jersey measures that extend reduced tuition rates and aid eligibility to certain students without lawful immigration status, provided they meet state-defined criteria.

The Justice Department has filed suit against New Jersey, Gov. Mikie Sherrill, and Attorney General Jennifer Davenport, alleging that the state’s “Law Enforcement Officer Protection Act” unlawfully restricts federal law-enforcement activity. The case, filed in federal court in New Jersey, tees up a direct confrontation over the limits of state power when federal officers operate within state borders.

At the center of the dispute is a familiar constitutional fault line: whether a state may regulate, constrain, or impose conditions on federal officials carrying out federal duties.