Key Takeaways
• On May 13, 2025, civil rights groups filed for a temporary restraining order against Oklahoma’s House Bill 4156.
• HB 4156 allows Oklahoma prosecutors to charge undocumented individuals, potentially leading to jail or fines, even for legal residents.
• The ACLU argues only the federal government should create and enforce immigration laws, not individual states like Oklahoma.
Civil Rights Groups Continue Legal Battle Against Oklahoma’s HB 4156
The American Civil Liberties Union (ACLU) and other leading civil rights groups have strengthened their fight to stop Oklahoma’s controversial anti-immigrant law, known as House Bill 4156. This renewed effort comes at a time when immigration issues remain highly debated across the United States 🇺🇸, especially as the struggle over who gets to make and enforce immigration laws continues.

The push from the ACLU, the National Immigration Law Center, and the law firm Rivas & Associates focuses on protecting people in Oklahoma from rules they believe are too harsh and could break federal law. Their most recent steps show just how important the outcome of this case could be for immigrants and for the balance of power between state and federal governments.
ACLU, Oklahoma Groups Take New Steps in Court
On May 13, 2025, the ACLU, joined by the National Immigration Law Center and Rivas & Associates, filed an updated complaint in federal court. They asked for a temporary restraining order—this is a legal tool that can stop a law from being enforced until a full decision is made—to urgently block Oklahoma’s House Bill 4156. According to their latest court filings, more people and organizations have joined as plaintiffs, including the local group Padres Unidos and individuals who are directly affected by HB 4156.
This move follows the U.S. Department of Justice’s decision to drop its own similar legal challenge only two months after President Trump’s second term began. With the federal government stepping aside, groups like the ACLU are leading the fight in court.
The core point that these organizations are making is straightforward: immigration laws should only be created and enforced by the federal government, not by individual states. They argue that Oklahoma is going too far by trying to police immigration issues within its own borders.
What Is House Bill 4156?
House Bill 4156, or HB 4156, was passed by the Oklahoma legislature to crack down on people living in the United States illegally. Supporters say the law is needed to keep their communities safe, but opponents, including the ACLU, have called it “one of the most extreme anti-immigrant bills ever to be passed by any state.” The law gives state prosecutors in Oklahoma the power to charge someone with “impermissible occupation” if they do not have legal status to be in the United States.
HB 4156 sets out clear punishments:
– A first conviction under this law would be a misdemeanor, which could mean up to one year in jail or a fine of $500.
– If someone is convicted again, it becomes a felony—a much more serious crime that can lead to longer jail time and heavier penalties.
Critics worry that HB 4156 does not just punish people who break the law; it could also break up families, force people out of their homes, and even lead to the banishment of people who have legal reasons to stay in the United States. According to the legal filings, these outcomes are not only unfair—they may also violate federal law.
Arguments Against the Law
The ACLU and its partners argue that HB 4156 goes against federal immigration laws in several major ways. Here are the main arguments they are putting forward:
– Only the federal government can decide who can be in the United States and under what conditions. States should not make their own immigration rules.
– The law gives state officials too much power, letting them decide who gets to stay in Oklahoma—even if those people have documents from federal immigration authorities that allow them to be in the country.
– By giving state courts the power to remove people from Oklahoma, the law risks banishing people who have a right to be in the United States according to federal rules.
They believe that laws like HB 4156 can create confusion and force local police and courts to handle matters they are not trained or allowed by law to handle.
Statements from Leaders and Legal Experts
Tamya Cox-Toure, the executive director of the ACLU of Oklahoma, spoke out strongly against the law. “HB 4156 is one of the most extreme anti-immigrant bills ever to be passed by any state. Our local law enforcement lacks the expertise and the constitutional authority to interpret and enforce immigration law, putting all community members at risk—citizen or not.”
This statement shines a light on a big concern: local police and courts might not fully understand complicated immigration rules, which could mean mistakes or unfair treatment for people with different backgrounds.
Noor Zafar, a senior staff attorney with the ACLU Immigrants’ Rights Project, also warned about the danger the law poses: “Every day that HB 4156 is in effect, it puts immigrants in Oklahoma at risk of arrest, detention, and banishment from the state and undermines the federal immigration system that Congress set up.”
Their statements underline the main worry—if state laws like HB 4156 are allowed to stand, it could mean that the patchwork of local rules will outweigh the federal system, making life much more confusing and risky for immigrants.
Earlier Court Actions and Federal Intervention
This is not the first time House Bill 4156 has faced legal challenges. When the Oklahoma legislature first passed HB 4156, it was set to go into effect on July 1, 2024. However, on June 28, 2024, a federal court put a temporary hold on the law, using what is called a “preliminary injunction.” This blocked the law from taking effect, at least until a final decision could be made.
That earlier lawsuit was filed by the same civil rights groups, and it was later joined by the U.S. Department of Justice under President Biden’s administration. These two legal complaints were eventually combined into a single case, which at that time sent a clear message: the federal government and civil rights groups agreed that Oklahoma was overstepping its legal limits with HB 4156.
However, after President Trump began his second term, the Department of Justice dropped its part of the lawsuit. With the federal government stepping back, it became up to groups like the ACLU, the National Immigration Law Center, and their legal partners to continue the fight.
What the Law Means for Immigrants and Communities
House Bill 4156 is more than just rules on paper; it has a direct impact on daily life for people in Oklahoma, especially immigrants. If the law is enforced, there are broad and personal consequences:
– Immigrants living in Oklahoma could be arrested, put in jail, or forced to leave the state—even if they have the right to stay in the United States under federal law.
– People who work with, hire, or rent homes to undocumented immigrants might also worry about getting caught up in the law’s penalties.
– Local police could be put in the difficult position of making judgments about someone’s immigration status without proper training or access to accurate information.
Advocates say this puts everyone on edge, not just people without the right paperwork. Even U.S. citizens and people with legal papers could be wrongly accused, especially if there are misunderstandings or mistakes about someone’s legal status.
Why the Fight Matters
The renewed legal challenge by the ACLU and others shows that the issue is not just about Oklahoma. Instead, it points to a much bigger question for the entire country: who really gets to set the rules for immigration? The U.S. Constitution gives that job to the federal government. When states like Oklahoma try to make their own separate immigration laws, it sets up a conflict that courts have to settle.
As reported by VisaVerge.com, HB 4156 is being watched closely because the outcome could influence what other states try to do. If Oklahoma is allowed to enforce its own immigration rules, other states might try to pass similar laws, making the situation even more uncertain for immigrants all over the United States.
Looking Back: State and Federal Tension Over Immigration
This struggle between state governments and the federal government on immigration is not new. For many years, states have sometimes tried to pass their own rules about who can live and work within their borders. But whenever states create laws that are very strict or very different from federal immigration rules, there is a legal “tug of war.”
Federal courts have often decided that the immigration system is a matter for the whole country, not something that should differ from one state to another. Supporters of strong state laws say that states need to protect themselves and make their own choices if they feel the federal government is not doing enough. Opponents, on the other hand, say this leads to confusion and unfairness, especially for people who are doing their best to follow the law.
What’s Next for HB 4156?
For now, the most important question is whether the court will grant the request for a temporary restraining order against HB 4156. If the order is granted, the law would once again be put on hold, and Oklahoma would not be allowed to enforce it while the larger lawsuit continues. If not, the law could start having real effects on people’s lives—leading to possible arrests, legal battles, and families being split up.
Anyone interested in checking the latest updates or learning more about immigration laws throughout the United States can visit the official website for U.S. Citizenship and Immigration Services for more information on nationwide rules and policies.
Key Takeaways
- The ACLU, with other civil rights groups, is making a renewed push in court to stop Oklahoma’s anti-immigrant House Bill 4156, arguing that immigration policy is up to the federal government, not individual states.
- HB 4156 lets Oklahoma prosecutors charge people living in the United States without proper papers, with penalties that include jail time and big fines. After a first offense, further charges can be treated as felonies.
- The arguments against HB 4156 say the law goes against federal rules, risks unfairly punishing both immigrants and citizens, and could separate families and remove people who have a legal right to be in the United States.
- A previous lawsuit led to a federal court putting the law on hold, but after the Department of Justice dropped its challenge following President Trump’s election, civil rights groups are carrying on the fight.
- The outcome of this case will be closely watched because it could impact how much power states have over immigration, not just in Oklahoma but across the nation.
For more updates and analysis on the fight against HB 4156 and other immigration news, readers are encouraged to visit ACLU’s dedicated page on this topic.
As these legal battles continue, the debate over the Oklahoma Anti-Immigration Law remains a central issue not only for immigrants and their families, but also for everyone concerned with the rule of law and fairness in the United States. The ACLU’s commitment to challenging HB 4156 shows that the fight over who controls immigration rules—and how those rules affect real people’s lives—is far from over.
Learn Today
House Bill 4156 → A controversial Oklahoma law permitting state prosecution of individuals based on their immigration status, with misdemeanor and felony penalties.
Temporary Restraining Order → A court order temporarily preventing enforcement of a law until a final legal decision occurs.
Preliminary Injunction → A legal measure by a court that blocks a law’s implementation while litigation is ongoing.
Plaintiffs → Individuals or organizations who initiate a lawsuit, claiming harm caused by the challenged law or action.
Federal vs. State Authority → The ongoing legal debate over which government level—federal or state—controls immigration regulation and law enforcement.
This Article in a Nutshell
Oklahoma’s controversial House Bill 4156 draws fierce opposition from the ACLU and civil rights groups who argue it encroaches on federal authority. If enacted, the law threatens immigrants and communities with harsh penalties, undermining federal law. The lawsuit’s outcome could set an influential legal precedent for state immigration authority nationwide.
— By VisaVerge.com
Read more:
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• ICE agents raid Oklahoma City home of US citizen family by mistake
• ICE raids wrong Oklahoma City home, traumatizes U.S. citizens
• Oklahoma international students stay as Trump administration reverses visa move
• Oklahoma State Superintendent proposes immigration status checks in schools