Index/Topics/Legal challenges to U.S. immigration policy

Legal challenges to U.S. immigration policy

The ongoing legal debate over the limits of U.S. immigration enforcement, including the role of courts and advocates

Fact-Checks

10 results
Jan 11, 2026
Most Viewed

Is a sanctuary state legal?

A “sanctuary state” is not defined in federal law, and state or local policies that limit cooperation with federal immigration enforcement sit in a contested but established legal space: generally per...

Jan 11, 2026
Most Viewed

Are there public examples of DuckDuckGo rejecting law enforcement requests?

DuckDuckGo publicly positions itself as a company that has little or no user-search data to hand over and therefore does not receive ordinary search-related law enforcement requests, a stance repeated...

Jan 17, 2026
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How do ICE detainers work and what are the constitutional limits on local compliance?

ICE detainers are administrative requests—typically the I-247 form—asking state or local jails to hold an individual for up to 48 hours beyond the time they would otherwise be released so ICE can tran...

Jan 15, 2026

What Supreme Court precedents govern state refusal to enforce federal law, and how do they apply to sanctuary policies?

The governing Supreme Court precedents are the anti‑commandeering line—principally New York v. United States and Printz v. United States—and more recent applications like Murphy v. NCAA that limit Con...

Jan 15, 2026

What Supreme Court decisions govern pretextual traffic stops and their interaction with immigration enforcement?

The principal Supreme Court decision that governs pretextual traffic stops is Whren v. United States, which holds that an officer’s subjective motivation is irrelevant so long as there is an objective...

Jan 14, 2026

How did enforcement priorities affect local law‑enforcement cooperation and sanctuary city policies under each administration?

Enforcement priorities from the federal executive have repeatedly reshaped whether and how local police cooperate with ICE: when Washington prioritized interior removals, it pressured—and sometimes su...

Jan 22, 2026

What expedited removal policies did the Obama administration implement for deportations?

significantly increased the use of expedited, nonjudicial removals—especially at the border—while pairing that operational expansion with internal enforcement-priority memos that aimed to concentrate ...

Jan 21, 2026

How do deportation counting methods (removals vs. returns) change public understanding of enforcement scale?

Counting "" as formal removals versus counting the broader set of returns and expulsions produces dramatically different headline totals and public impressions, because removals carry legal orders and...

Jan 11, 2026

When can ice stop a car regarding immigration

Immigration and Customs Enforcement (ICE) can stop, question, detain and arrest people in vehicles when agents have reasonable suspicion or probable cause to believe an immigration law has been violat...

Jan 9, 2026

What is the legal basis for immigration law enforcement, and is Trump's deployment of ICE, per say, legal?

The legal basis for immigration enforcement rests primarily on federal statutes—the Immigration and Nationality Act (INA) and implementing regulations—and the executive branch’s duty to “faithfully ex...