WASHINGTON — The U.S. Supreme Court handed President Donald Trump a major setback Monday by upholding birthright citizenship, but Vice President JD Vance and other conservatives are already pointing to the close ruling as a sign the constitutional fight may only be temporarily delayed.
The Court ruled in Trump v. Barbara that children born in the United States to parents who are in the country illegally or only temporarily are citizens at birth under the 14th Amendment.
The ruling blocks Trump’s executive order seeking to deny automatic citizenship to certain children born on American soil. For now, the decision preserves the long-standing rule that nearly everyone born in the United States is an American citizen from birth.
But the decision was not a sweeping 9-0 rejection of Trump’s position. Conservatives quickly seized on the narrow split as evidence that birthright citizenship, once considered almost untouchable, may now be legally and politically vulnerable.
Vance called the ruling “a major, major mistake” and said it could encourage birth tourism, in which foreign nationals enter the United States to give birth so their children receive American citizenship.
“It’s just a preposterous ruling,” Vance said during a Fox News appearance.
At the same time, Vance argued there was a “big silver lining” for conservatives because the ruling was closer than many legal observers expected. He suggested the vote shows there may be a future path to keep challenging birthright citizenship through Congress, future litigation or a different Supreme Court lineup.
The ruling came in a case testing the meaning of the 14th Amendment’s Citizenship Clause, which says: “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.”
Chief Justice John Roberts wrote the main opinion for the Court, joined by Justices Sonia Sotomayor, Elena Kagan, Amy Coney Barrett and Ketanji Brown Jackson. Justice Brett Kavanaugh agreed with the judgment but took a narrower path, saying Trump’s order violated federal citizenship law rather than joining the full constitutional holding.
Justices Clarence Thomas, Samuel Alito and Neil Gorsuch dissented.
That alignment gives both sides something to point to.
Supporters of birthright citizenship say the Court reaffirmed a central constitutional protection rooted in the aftermath of the Civil War and confirmed by more than a century of legal precedent.
Trump allies say the ruling exposed real disagreement on the Court and left room for continued efforts to narrow or eventually overturn automatic citizenship for children of illegal immigrants and temporary visitors.
President Trump expressed disappointment with the ruling and is expected to continue pressing the issue politically. His administration has argued that birthright citizenship has become an incentive for illegal immigration and birth tourism.
The Justice Department also moved quickly after the ruling by directing federal prosecutors to prioritize investigations into birth tourism schemes, signaling that the administration will continue attacking the practice through immigration fraud and enforcement actions even after losing the executive-order fight.
The ruling also drew reaction from Iowa Republicans.
U.S. Rep. Ashley Hinson, a Republican who represents northeast Iowa and is running for the state’s open U.S. Senate seat, criticized the decision.
“For too long, birthright citizenship has been exploited to incentivize illegal immigration,” Hinson said in a social media post after the ruling.
Hinson has backed legislative efforts to narrow birthright citizenship. She is listed as a cosponsor of the federal Birthright Citizenship Act of 2025, which would amend federal immigration law so that a person born in the United States would be considered a citizen at birth only if at least one parent is a U.S. citizen or national, a lawful permanent resident, or a noncitizen lawfully serving in the U.S. armed forces.
In another post, Hinson said, “We are going to end the con of birthright citizenship!”
Iowa Attorney General Brenna Bird also had supported Trump’s effort to challenge automatic birthright citizenship for children of illegal immigrants and temporary visitors. Local reporting after Monday’s ruling said Bird was disappointed with the Supreme Court’s decision.
Immediate public statements from Gov. Kim Reynolds, U.S. Sen. Chuck Grassley and U.S. Sen. Joni Ernst have consistently supported stronger border enforcement and tougher federal immigration policy under the Trump administration.
The decision has major practical implications for Iowa and the rest of the country. It preserves citizenship for children born in the United States regardless of their parents’ immigration status, with narrow exceptions such as children of foreign diplomats.
Immigrant-rights groups celebrated the ruling as a major victory. They argued Trump’s order would have created a class of children born in America but denied American citizenship.
In Iowa, advocacy group Escucha Mi Voz welcomed the decision, with members saying birthright citizenship has protected immigrant families who have lived and worked in the United States for years.
But critics say the ruling leaves in place a policy they believe rewards illegal immigration and encourages foreign nationals to use childbirth as a route to long-term U.S. benefits.
Roberts’ opinion traced the history of birthright citizenship from English common law through the Civil War, the Dred Scott decision, the Civil Rights Act of 1866 and the 14th Amendment. The majority also leaned on United States v. Wong Kim Ark, the 1898 Supreme Court case that upheld citizenship for a man born in San Francisco to Chinese immigrant parents.
For birthright citizenship supporters, that history makes the issue settled.
For Trump, Vance, Hinson and other conservatives, Monday’s ruling appears to have done the opposite: it turned birthright citizenship into an even more visible political target.
The dissents reflected that continued divide. Thomas, Alito and Gorsuch argued the 14th Amendment has been read too broadly and does not necessarily require automatic citizenship for children whose parents lack permanent allegiance to the United States.
Kavanaugh’s narrower concurrence may also become important in the next phase of the fight. By focusing on federal law rather than fully joining the constitutional majority, Kavanaugh left open questions about whether Congress could attempt to change citizenship rules by statute.
That is where conservatives are likely to focus next.
A constitutional amendment would be the clearest but hardest route to changing birthright citizenship. Federal legislation would be easier to pass if Republicans control Congress and the White House, but any such law would almost certainly face immediate lawsuits.
The Trump administration may also continue targeting birth tourism, document fraud and immigration loopholes while keeping birthright citizenship in the political spotlight.
For now, the Supreme Court has preserved automatic citizenship for children born in the United States.
But Vance’s message after the ruling was clear: conservatives lost this round, but they believe the vote shows the issue is hanging by a thread — and that birthright citizenship may remain one of the biggest immigration fights of Trump’s second term.