The Constitutional Imperative: Federal Authority Over Immigration Law Enforcement

by Robert Kalebra, ©2026

(Jan. 31, 2026) — “The Constitution itself never yields to treaty or enactment; it neither changes with time nor does it in theory bend to the force of circumstances. It may be amended according to its own permission; but while it stands it is `a law for rulers and people, equally in war and in peace, and covers with the shield of its protection all classes of men, at all times and under all circumstances.’ Its principles cannot, therefore, be set aside in order to meet the supposed necessities of great crises.” – Judge Thomas M. Cooley: Principles of Constitutional Law; See also Downes v. Bidwell, 182 US 244, 370, 21 S. Ct. 770, 45 L. Ed. 1088 – Supreme Court, 1901 (dissenting opinion)

I keep receiving inquiries on my take of what America is witness to in Minnesota and other states regarding federal authority to enforce the immigration laws.  This isn’t going to address the recent shootings and killing of two US citizens.  That’s a different matter altogether involving many different clearly established constitutional and legal standards of law, evidence, and police standards of conduct and the use of force and use of deadly force.  This isn’t about that.  In fact, President Trump is actually showing extreme restraint regarding these sanctuary cities, states, and the officials facilitating these usurpations of the Constitution and federal supremacy to enforce federal law.

The United States Constitution [1], [2], [3] establishes a clear framework for the division of powers between the federal government and the states. This framework is designed to ensure that certain critical functions, such as the enforcement of immigration laws, remain within the exclusive purview of the federal government. Recent actions by some states to obstruct and defy federal immigration laws raise serious constitutional questions and highlight the importance of adhering to the principles of federalism and the rule of law.

After researching the matter all I can say to President Trump is, “Why are you not arresting and prosecuting these police, lawyers, judges, city officials, county and state officials including their obstructionist Governors?”

The Constitutional Basis for Federal Immigration Authority

The Constitution vests the federal government with the sole authority to regulate immigration. This authority is derived from several key provisions:

1.  Article VI, Clause 2 (Supremacy Clause): [4] This clause establishes that the Constitution, laws, and treaties of the United States are the supreme law of the land. Any state law that conflicts with federal law is null and void. This preempts state laws that attempt to regulate immigration in a manner inconsistent with federal policy. For example, in Arizona v. United States (2012) [5], the Supreme Court struck down several provisions of Arizona’s SB 1070, stating that federal law preempts state law in the area of immigration enforcement.

2.  The 10th Amendment: [6] This amendment reserves to the states or the people all powers not delegated to the United States by the Constitution, nor prohibited by it to the states. However, the power to regulate immigration is explicitly delegated to the federal government, leaving no room for state intervention. The 10th Amendment does not grant states the authority to regulate immigration; rather, it confirms that such power resides with the federal government.

3.  Federal Preemption: [7] The doctrine of federal preemption ensures that federal laws take precedence over state laws in areas where the federal government has exclusive jurisdiction. Immigration is one such area, as evidenced by numerous Supreme Court decisions. In Hines v. Davidowitz (1941) [8], the Supreme Court held that federal law preempts state law in the area of alien registration, emphasizing the federal government’s exclusive authority over immigration matters.

The Sole Province of the Federal Government

The enforcement of immigration laws is a federal responsibility for several reasons:

1.  Uniformity and Consistency:  Immigration policies must be uniform across the nation to ensure consistency in the application of laws and to prevent disparities that could undermine national security and public safety. A patchwork of state immigration laws would create confusion and inefficiencies, making it difficult to enforce immigration policies effectively.

2.  Foreign Relations: Immigration policies have significant implications for foreign relations. The federal government, through the executive branch, is better equipped to handle the diplomatic and international aspects of immigration. For instance, the federal government can negotiate treaties and agreements with other countries, which is crucial for managing immigration flows and addressing global migration issues.

3.  Resource Allocation: The federal government has the resources and infrastructure necessary to enforce immigration laws effectively. State involvement could lead to duplication of efforts and inefficiencies. Federal agencies such as Immigration and Customs Enforcement (ICE) and Customs and Border Protection (CBP) are specifically designed to handle immigration enforcement, with specialized training, equipment, and personnel.

4.  National Security: Immigration enforcement is closely tied to national security. The federal government has the authority and responsibility to protect the nation from threats, including those posed by unauthorized immigration. State involvement in immigration enforcement could compromise national security efforts by creating gaps in enforcement and coordination.

Sanctuary Policies and Constitutional Treason

Some states and local jurisdictions have adopted “sanctuary” policies, which actively obstruct federal immigration enforcement. These policies are not only in violation of federal law but also constitute a usurpation of constitutional authority. Public officials who facilitate such defiance are in breach of their oaths of office and, arguably, in treason to their constitutional duties.

1.  Oath of Office: Public officials take an oath to support and defend the Constitution of the United States. By implementing sanctuary policies, these officials are actively undermining federal law and the constitutional framework that grants the federal government exclusive authority over immigration. For example, the oath of office for federal officials, as prescribed by 5 U.S.C. §3331 [9], requires them to “support and defend the Constitution of the United States against all enemies, foreign and domestic.”

2.  Treason to Office:  The term “treason” in this context refers to the betrayal of constitutional duties. Public officials who knowingly and willfully obstruct federal immigration enforcement are acting in direct contravention of their sworn obligations. This betrayal of duty can have serious consequences, including legal action and removal from office.

3. Legal Consequences: The implementation of sanctuary policies can have serious legal consequences. Federal courts have the authority to enforce federal laws and can hold states and local jurisdictions accountable for their actions. Public officials who engage in such defiance may face legal action, including removal from office and potential criminal charges. For instance, in United States v. San Francisco (2018) [10], a federal court ruled that San Francisco’s sanctuary policies violated federal law and could result in legal action against the city.

4.  Public Safety: Sanctuary policies can also have detrimental effects on public safety. By obstructing federal immigration enforcement, these policies can allow dangerous individuals to remain in the community, posing a threat to public safety. For example, the murder of Kate Steinle in San Francisco in 2015 [11], [12] by an undocumented immigrant with a lengthy criminal record highlighted the potential dangers of sanctuary policies.

Historical Precedent and Judicial Interpretation

Historical precedent and judicial interpretation further support the federal government’s exclusive authority over immigration. Throughout American history, the federal government has consistently asserted its authority over immigration matters, and the courts have upheld this authority. For example, in Chae Chan Ping v. United States (1889) [13], the Supreme Court affirmed the federal government’s plenary power over immigration, stating that “the power of exclusion of foreigners is an incident of sovereignty belonging to the government of the United States as part of its power to maintain its independence.”

Sanctuary Policies and the Echoes of Secession:

The ongoing defiance and obstruction of federal immigration laws by sanctuary cities and states raise profound constitutional questions and historical parallels. The actions of these jurisdictions, which actively impede federal immigration enforcement, bear a striking resemblance to the secessionist movements of the antebellum South. Just as the Southern states sought to nullify federal laws and assert their own authority, sanctuary policies represent a modern form of nullification that undermines the constitutional framework and the rule of law.

Historical Parallels: Secession and Nullification

The secession of Southern states in the mid-19th century was rooted in a desire to nullify federal laws and assert state sovereignty. The Southern states argued that they had the right to secede from the Union and establish their own governments, free from federal interference. This position was ultimately rejected by the federal government, leading to the Civil War.

Similarly, sanctuary cities and states assert their right to nullify federal immigration laws and establish their own policies, effectively seceding from the federal immigration enforcement system. This modern form of nullification challenges the supremacy of federal law and the constitutional framework that grants the federal government exclusive authority over immigration.

The Constitutional Framework and Federal Authority

The Constitution establishes a clear division of powers between the federal government and the states. The Supremacy Clause (Article VI, Clause 2) [14] ensures that federal laws take precedence over state laws in areas where the federal government has exclusive jurisdiction. Immigration is one such area, as evidenced by numerous Supreme Court decisions.

The 10th Amendment reserves to the states or the people all powers not delegated to the United States by the Constitution, nor prohibited by it to the states. However, the power to regulate immigration is explicitly delegated to the federal government, leaving no room for state intervention. The federal government’s exclusive authority over immigration is further supported by historical precedent and judicial interpretation.

Sanctuary Policies as Modern Nullification

Sanctuary policies represent a modern form of nullification, as they actively obstruct and defy federal immigration laws. These policies are not only in violation of federal law but also constitute a usurpation of constitutional authority. Public officials who facilitate such defiance are in breach of their oaths of office and, arguably, in treason to their constitutional duties.

1. Oath of Office: Public officials swear an oath to support and defend the Constitution of the United States. However, by enacting sanctuary policies, these officials actively subvert federal law and the constitutional principles that vest the federal government with exclusive authority over immigration and the status of individuals within U.S. jurisdiction who lack constitutional or lawful right to be present. In doing so, these officials effectively facilitate the presence of individuals who, in a legal sense, have “invaded” the United States. This dereliction of duty warrants serious repercussions, including potential legal action and removal from office.

2. Treason to Office: As previously mentioned, the term “treason” in this context denotes the breach of constitutional duties. Public officials who deliberately and intentionally hinder federal immigration enforcement are acting in direct violation of their sworn obligations. This breach of duty demands serious consequences, including potential legal action and removal from office.

3. Legal Consequences:  Sanctuary policies may have serious legal repercussions. Federal courts possess the power to uphold federal laws and can compel states and local jurisdictions to answer for their actions. Public officials who defy federal immigration enforcement may find themselves subject to legal proceedings, including potential removal from office and even criminal prosecution. The adoption of sanctuary policies can lead to severe legal ramifications. Federal courts can enforce federal laws and hold states and local jurisdictions responsible for their actions.

The Dangers of Nullification [15], [16]

The dangers of nullification are evident in both historical and contemporary contexts. Nullification undermines the rule of law and the constitutional framework, leading to chaos and instability. In the antebellum South, nullification led to secession and ultimately to the Civil War. In the contemporary context, sanctuary policies create a patchwork of immigration enforcement, undermining national security and public safety.

1. National Security: Immigration enforcement is closely tied to national security. The federal government has the authority and responsibility to protect the nation from threats, including those posed by unauthorized immigration. State involvement in immigration enforcement could compromise national security efforts by creating gaps in enforcement and coordination.

2.  Public Safety: As previously noted, sanctuary policies pose grave threats to public safety. By impeding federal immigration enforcement, these policies enable dangerous individuals to remain at large, endangering communities. Recent high-profile cases, such as the murder of Kate Steinle, have highlighted the very real dangers posed by undocumented immigrants with extensive criminal records. Despite opposition claims to the contrary, the risks are undeniable and demand urgent attention. A further list of names of Americans killed by illegals can be found here [17].

The Need for Constitutional Fidelity

The actions of sanctuary cities and states underscore the need for constitutional fidelity and the rule of law. Public officials must fulfill their constitutional duties and support the federal government’s efforts to enforce immigration laws effectively. Failure to do so not only undermines the rule of law but also compromises national security and public safety.

1.  Enforcement of Federal Law: The federal government must enforce federal immigration laws consistently and vigorously [18]. This includes holding states and local jurisdictions accountable for their actions and ensuring that sanctuary policies are not tolerated.

2.  Judicial Intervention:  The courts play a crucial role in enforcing federal law and holding states and local jurisdictions accountable. Federal courts must be vigilant in upholding the supremacy of federal law and ensuring that sanctuary policies are not allowed to undermine immigration enforcement.

3.  Public Awareness:  Public awareness and support for the rule of law are essential. Citizens must understand the importance of constitutional fidelity and the dangers of nullification. Public officials must be held accountable for their actions and be reminded of their oaths of office.

In Summary

The enforcement of immigration laws is a federal responsibility, clearly delineated by the Constitution. States that actively obstruct and defy federal immigration laws are in violation of their Statehood Acts [19] [20] and the principles of federalism [21]. Sanctuary policies represent a usurpation of constitutional authority and a betrayal of the oaths taken by public officials. It is imperative that all levels of government adhere to the constitutional framework and uphold the rule of law to ensure the integrity and security of the nation. Public officials must fulfill their constitutional duties and support the federal government’s efforts to enforce immigration laws effectively. Failure to do so not only undermines the rule of law but also compromises national security and public safety. 

The defiance and obstruction of federal immigration laws by sanctuary cities and states represent a modern form of nullification that echoes the secessionist movements of the antebellum South. This nullification undermines the constitutional framework and the rule of law, leading to chaos and instability. It is imperative that all levels of government adhere to the constitutional framework and uphold the rule of law to ensure the integrity and security of the nation. Public officials must fulfill their constitutional duties and support the federal government’s efforts to enforce immigration laws effectively. Failure to do so not only undermines the rule of law but also compromises national security and public safety. The lessons of history serve as a stark reminder of the dangers of nullification and the importance of constitutional fidelity.

President Trump has exercised considerable restraint, but he is in constitutional and legal fact the sole possessor of the right and authority to employ military force to ensure compliance with federal immigration laws by these officials, cities, and states. Regardless of his discretion or potential misuse of that discretion, his constitutional duty is clear: to enforce federal criminal obstruction laws against state, county, and municipal officials who overstep their constitutional bounds and usurp the President’s authority to faithfully execute immigration laws.

When a public official exercises authority he knows he does not lawfully possess, such authority exercised is usurped authority.  When usurped authority is exercised, no immunity is available because the Supreme Court made it perfectly and unambiguously clear, “no excuse is permissible,” even for a judge in usurpation of authority of his office [22].

Links to Authorities:

[1] https://constitution.congress.gov/constitution/

[2] https://constitution.congress.gov/browse/essay/intro-7-1/ALDE_00000028/

[3] https://constitution.org/1-Constitution/cmt/tmc/pcl.htm

[4] https://www.law.cornell.edu/constitution-conan/article-6/clause-2/supremacy-clause-current-doctrine

[5]  https://www.law.cornell.edu/supremecourt/text/11-182

[6] https://constitution.congress.gov/constitution/amendment-10/

[7] https://www.findlaw.com/litigation/legal-system/the-supremacy-clause-and-the-doctrine-of-preemption.html

[8] https://supreme.justia.com/cases/federal/us/312/52/

[9] https://www.law.cornell.edu/uscode/text/5/3331

[10] https://law.justia.com/cases/federal/appellate-courts/ca9/17-17478/17-17478-2018-08-01.html

[11] https://www.news8000.com/news/politics/national-politics/how-kate-steinle-s-case-became-one-of-the-biggest-

trials-of-the-year/article_ec5b1031-c81e-5aec-ab20-ded18eb0a990.html

[12] https://www.cbsnews.com/news/help-me-dad-father-recounts-kate-steinles-last-moments-on-san-francisco-pier/

[13] https://www.law.cornell.edu/supremecourt/text/130/581

[14] https://www.law.cornell.edu/constitution/articlevi

[15] https://en.wikipedia.org/wiki Nullification_(U.S._Constitution)

[16] https://www.usahistorytimeline.com/pages/the-doctrine-of-nullification-a-controversial-concept-03102247.php

[17] https://americanskilledbyillegals.org/list-of-americans-killed-by-illegal-immigrants/

[18]  https://www.law.cornell.edu/constitution-conan/article-2/section-3/take-care-clause-overview

[19] https://en.wikipedia.org/wiki/Admission_to_the_Union

[20] https://constitutioncenter.org/the-constitution/articles/article-iv/clauses/46

[21] https://www.law.cornell.edu/wex/federalism

[22] https://www.law.cornell.edu/supremecourt/text/80/335

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Updated, Feb. 1, 2026, 7:59 a.m. EST