
The US President can influence immigration law through executive orders, which can be reversed by the next president. The US Constitution grants Congress the power to make immigration laws, which the President can sign into effect or veto. The US Supreme Court has described the power to make immigration laws as flowing from the Constitution's establishment of a federal government. The executive branch, including the President, can propose and push for new or amended immigration legislation. The President can also direct the Department of Homeland Security to enforce existing immigration laws.
| Characteristics | Values |
|---|---|
| Can the US President pass immigration law? | No, but they can propose and push for new or amended immigration legislation. |
| Who can pass immigration law? | Congress. |
| What does the law cover? | Who is eligible to immigrate, how many can do so each year, who is inadmissible, penalties for violating the law, etc. |
| Can the President change the law? | No, but they can sign federal laws into effect and issue executive orders. |
| Can the President veto the law? | Yes, but Congress can override the veto. |
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What You'll Learn

The US President's power to suspend the entry of immigrants
The US President does have the power to suspend the entry of immigrants or non-immigrants, and this power has been used by several presidents. This power is derived from the Immigration and Nationality Act (INA) § 212(f), which grants the executive branch broad discretionary authority to "suspend" the entry of certain groups. This power has been used by presidents of both parties to control immigration, both lawful and irregular.
For example, President Trump used this authority to implement the "Muslim Ban" or "travel ban," which banned the entry of people from seven predominantly Muslim countries, even including those with lawful permanent resident status. President Biden also used this authority to suspend the entry of certain immigrants and non-immigrants who were deemed to be "enabling corruption."
However, it is important to note that this power is not limitless. Federal courts have held that the power to suspend entry does not allow the executive branch to completely ignore due process. For instance, in the "Muslim Ban" cases, courts found that the order likely deprived individuals of their due process rights by failing to give them sufficient notice or a hearing. Additionally, some courts have ruled that the president may not invoke this authority to address purely domestic considerations, such as high unemployment or costs to taxpayers.
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Congress's power to change immigration law
Congress has the power to change immigration law in the United States. This power is derived from the Constitution, which establishes a federal government and gives Congress the authority to make laws concerning the entry and stay of foreign nationals in the country. This power is often referred to as "plenary" power, giving Congress almost complete authority in this area.
The Migration and Importation Clause, which barred Congress from outlawing the slave trade before 1808, is also mentioned as a source of congressional immigration power. Additionally, the power to declare war is sometimes cited as a factor in immigration decisions. The Supreme Court has upheld Congress's power over immigration, recognizing the power to exclude foreigners as an incident of sovereignty belonging to the US government.
While Congress has the primary power to change immigration law, the executive branch, including the president, can propose and push for new or amended immigration legislation. They do this through executive orders, which direct administrative agencies on how to enforce the law. These orders cannot change or create new laws but can have a significant impact on immigration policy. For example, President Biden revoked Presidential Proclamation 9945, which suspended the entry of immigrants who would financially burden the US healthcare system.
The federal courts also play a role in shaping immigration law. They interpret the laws passed by Congress and can change the law through their opinions and rulings. Additionally, individuals can challenge existing immigration laws or the government's interpretation of them in court, potentially leading to changes in the law. The administrative agencies themselves decide on many challenges to immigration laws, rules, and policies, and their decisions can be difficult to appeal or overturn.
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The role of the Department of Homeland Security
The Department of Homeland Security (DHS) is a US federal executive department responsible for public security, including anti-terrorism, border security, immigration and customs, cybersecurity, and disaster prevention and management. It is the third-largest Cabinet department, with over 240,000 employees.
DHS was established as a stand-alone department by the Homeland Security Act of 2002, enacted in response to the September 11 attacks. It began operations on March 1, 2003, and was formed through the combination of all or part of 22 different federal departments and agencies. Two notable agencies combined within DHS were the US Customs Service and the Immigration and Naturalization Service (INS). The investigative divisions and intelligence-gathering units of these agencies were merged to form Homeland Security Investigations (HSI), the primary investigative arm of DHS. HSI is a federal law enforcement agency within DHS that investigates crime on a global scale to protect the nation from global threats and ensure the safety of Americans.
DHS contains operational components that execute specific missions, support components that support the mission of DHS and its operational components, and components in the Office of the Secretary that support department leadership and establish policies. The United States Citizenship and Immigration Services (USCIS), an operational component of DHS, oversees lawful immigration into the United States.
DHS has faced legal challenges related to its immigration enforcement policies. For example, in Philadelphia Yearly Meeting of the Society of Friends v. DHS (2025), Quaker meetings filed a lawsuit against DHS to block its policy allowing federal immigration enforcement officials to enter houses of worship for immigration enforcement actions, arguing that the policy violated the First Amendment and other protections.
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The President's ability to issue executive orders
The US Constitution grants Congress the power to make laws on immigration, including who can enter, how many can enter, and who is inadmissible. The federal Immigration and Nationality Act, which is the primary law governing immigration in the United States, was passed by Congress. It is also within Congress's power to change or amend this law. The executive branch, including the President, can propose and advocate for new or amended immigration legislation. In recent years, Presidents have turned to "executive orders" to address their frustrations with Congress's inability to pass immigration legislation.
Executive orders can have a significant impact on immigration policy and enforcement. For instance, President Biden revoked Presidential Proclamation 9945, which had suspended the entry of immigrants who would financially burden the US healthcare system. However, executive orders can be challenged in court and reversed by subsequent Presidents, as seen with President Trump's attempts to reverse the Deferred Action for Childhood Arrivals (DACA) program.
While the President can issue executive orders on immigration, their power is limited, and they cannot unilaterally change the underlying immigration laws established by Congress. Executive orders are meant to interpret, enforce, or implement existing laws and are subject to legal challenges if they are found to overreach or conflict with congressional legislation. The Supreme Court has affirmed Congress's "plenary power" over immigration, recognizing it as a sovereign power delegated by the Constitution.
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Supreme Court rulings on immigration law
The US Supreme Court has made several rulings on immigration law, often concerning the rights of non-citizens and the powers of the federal government in enforcing immigration policies.
In the late 19th century, the Supreme Court developed the "plenary power" doctrine, which gives judicial deference to immigration policies created by the legislative and executive branches. This doctrine underscores the broad power of Congress over immigration and naturalization, allowing for rules and regulations that treat foreign nationals differently from citizens. For example, in Kleindienst v. Mandel (1972), the Court upheld the Attorney General's decision to deny a foreign national's entry into the US, even when it conflicted with the First Amendment interests of those wishing to communicate with that individual.
The Supreme Court has also ruled on the constitutional safeguards that foreign nationals are entitled to, such as equal protection. In Graham v. Richardson (1971), the Court found that state statutes denying welfare benefits to foreign nationals violate the Equal Protection Clause and infringe on the federal government's exclusive power over their entrance and residence. Similarly, in Lopez v. Gonzales (2006), the Court considered the procedural and substantive standards for detention to prevent acts of terrorism while emphasising the need for freedom from arbitrary restraint and adherence to the separation of powers.
More recently, in Department of State v. Munoz (2024), the Supreme Court ruled that citizens do not have a fundamental liberty interest in their noncitizen spouse being admitted to the country. Additionally, in Johnson v. Arteaga-Martinez (2022), the Court decided that the government is not required to provide bond hearings for foreign nationals detained for six months, where the government must prove they pose a flight risk or danger to the community.
In a notable case, the Supreme Court temporarily blocked the deportation of a group of accused Venezuelan gang members in 2025, drawing criticism from Justice Samuel Alito, who argued that the decision was "unprecedented and legally questionable." This case highlighted the tension between the executive branch's asserted power over immigration enforcement and the judicial review exercised by the Supreme Court.
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Frequently asked questions
No, but they can propose and push for new or amended immigration legislation. The US president can also issue "`executive orders'" to temporarily change the way immigration laws are handled or interpreted.
Yes, the US president can suspend the entry of immigrants or impose restrictions if they find that the entry of any aliens or class of aliens would be detrimental to the interests of the United States.
The US president cannot revoke an existing immigration law, but they can issue an order reversing an existing executive order.
The US president can attempt to offer a path to citizenship, but this can be blocked by a federal judge.
No, federal laws are written by Congress and become effective when signed by the US president or when a presidential veto is overridden by both the House of Representatives and the Senate.
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