Immigration enforcement shows how federalism plays out on the ground

Opposing policies over immigration and sanctuary cities define the contemporary debate over federalism

Disputes between the federal government, Republican-controlled states, and Democratic-controlled cities over immigration enforcement and sanctuary policies have become a central flash point in modern federalism. These conflicts will shape the future of state autonomy, federal authority, and the enforcement of national policy across jurisdictions.

Sharp partisan divides shape how Americans view immigration enforcement

A January 2026 survey shows large party gaps: Both sides broadly support recording arrests, but Democrats are much more likely than Republicans to support sharing officer locations and to oppose profiling, masked officers, and neighborhood-based enforcement.

Sanctuary cities limit local cooperation with federal immigration enforcement

Sanctuary cities limit how local agencies help ICE—such as restricting detainers, jail transfers, or data sharing—while still enforcing criminal law, leaving immigration enforcement mostly to federal authorities.

Federalism creates tension between national and state power by design

Federalism assigns authority so that neither the national government nor the states entirely dominate the other or the people they govern. By creating overlapping claims of power, the system makes negotiation, conflict, and compromise a permanent feature rather than a failure.

Courts referee federalism disputes between Congress and the states

Modern federalism is primarily worked out through litigation. The Supreme Court decides disputes in written opinions that explain when federal law preempts state authority, how far Congress's powers extend, and when states may resist.

Both parties largely agree that America's immigration system is broken

This three‑part podcast series traces America's immigration system origins, revealing how historically celebrated Ellis Island-era policies evolved into today's fractured, fact‑starved debate—shedding light on economic, cultural, and political forces shaping the current dysfunction.

Federal systems are a minority among the United Nations' 193 members

Of the United Nations' 193 member countries, roughly two dozen use a federal system, dividing power constitutionally between national and subnational governments. This group includes the United States, India, Canada, Germany, and more. The video walks through examples of how these states operate.

Immigration and Customs Enforcement handles immigration enforcement within the interior of the US

ICE operates inside the United States, enforcing immigration laws through investigations, arrests, detention, and deportation of individuals residing in the country illegally. This page provides an overview of the agency's mission, structure, and internal enforcement operations.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

Track the changes in US immigration law throughout history

This interactive timeline tracks the development of US immigration law, overlaid with time-series data on percentages of the foreign-born population. Explore how each major policy development correlated with immigration levels, revealing the relationship between legislation and demographic change.

Visually explore the federal government’s evolving role in education

This photo collection traces the US shift from community and private schooling to federal oversight and ongoing political debates about the Department of Education.

States are increasingly using preemption laws to override local decisions

Preemption laws enable state legislatures to prevent cities and counties from enacting their own rules on issues like minimum wage, gun control, and housing. Their use has increased significantly in recent years.

Supreme Court Justice Louis Brandeis once called states 'laboratories of democracy'

Louis Brandeis argued that federalism allows states to experiment with new policies without committing the entire nation, thereby allowing successful ideas to spread while limiting the risks of failure.

Policies related to the coronavirus pandemic inadvertently increased illegal border crossings

A pandemic-era public health measure called Title 42—intended to seal the border by expelling migrants immediately—backfired. Because expulsions carried no legal consequences, migrants simply tried again, driving illegal crossings to a peak of over 370,000 people in December 2023.

Hear from those who reported on the ground in Minneapolis amid immigration raids

In this podcast episode, journalists reporting from Minneapolis describe ICE enforcement actions, street protests, and community fallout—offering firsthand accounts of how immigration crackdowns are unfolding in the Midwestern city.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

The New Deal shifted economic and social authority to the federal government

Franklin D. Roosevelt's response to the Great Depression expanded federal power through economic regulation and social welfare programs, permanently reshaping federalism by shifting responsibility for financial security to Washington while leaving states to administer many of these programs.

See how local, state, and federal governments divide the cost of public services

Federal, state, and local governments share responsibility for funding public services. Education, roads, and social programs are funded through a complicated mix of taxes and intergovernmental transfers.

Thousands of state voting changes have been federally blocked since the Voting Rights Act

Since 1965, federal oversight has blocked thousands of state-level voting changes—including redistricting plans—by requiring approval for measures that could affect minority representation, a process scaled back by the Supreme Court in 2013.

An adultery and poisoning case examined whether federal treaty power supersedes state law

This Radiolab podcast unpacks Bond v. United States, where a local love-triangle assault became a federal case under an international treaty—forcing the Supreme Court to confront a founding question: How far can federal power reach into crimes traditionally handled by the states?

President Trump has changed decades-long norms for the DOJ during his second term

The Trump administration made changes to ethics oversight, instructed US attorneys to coordinate with the White House, dismissed cases, and overhauled the career hiring process in the Civil Rights division. The administration asserts these changes were justified and aimed to end what they claim as the weaponization of government.

The 1924 Immigration Act established national-origin quotas favoring certain regions

The Johnson-Reed Act established stringent national-origin quotas favoring northern and Western Europeans while restricting immigration from other regions. This article chronicles the act's origins, its implications, and subsequent efforts to overturn these restrictions.

When a state’s minimum wage differs from the federal's, the higher number wins out

Being that the federal government hasn’t raised the minimum wage in over 15 years, some states have taken matters in their own hands.

Hear how the 2 religious clauses in the First Amendment have been tested and evolved over time

This podcast examines the evolution of the free exercise and establishment clauses, tracing their development from federal restrictions to state and local laws. Discover the believers who challenged the limits of religious freedom throughout American history.

States have stepped in to keep national parks open during shutdowns

National parks typically close during federal shutdowns, but in 2023, Arizona and Utah planned to use state funds to keep parks open—highlighting how shutdowns can disrupt tourism and local economies.

European colonization dramatically reshaped Native American life

As European settlers expanded across North America, Native Americans faced displacement, violence, and forced negotiations. Colonial powers used trade relationships, treaties, and military force to reshape Indigenous communities and claim their territories.

The International Religious Freedom Act of 1998 made religious liberty a formal US foreign policy priority

Congress enacted the International Religious Freedom Act to make promoting religious freedom abroad a stated goal of US foreign policy. The law established an ambassador-at-large for international religious freedom and mandated that the State Department report annually on the status of religious freedom.

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

Watch how viruses like Ebola can spill over from animals to humans—and vice-versa.

Tattoos remain visible on your skin thanks to immune cells called macrophages

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Doctors differentiate between a phobia and fear by asking patients whether their fear interferes with their day-to-day activities.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

Play the role of a student in a game where you try to navigate college and remain debt-free, selecting different income levels, high school experience, race, ethnicity, and more.

Watch how deep-sea mining equipment collects and processes polymetallic nodules—metal-rich, potato-shaped rocks—from the ocean floor and creates environmentally damaging plumes of sediments.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in terms of casualties, forces mobilized, and displacement of civilians.

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.