A narrow but consequential Supreme Court ruling has left President Donald Trump’s push to end birthright citizenship in limbo, even as one of his own nominees quietly charted a different route toward the same destination.
Justices struck down Executive Order 14160 by a 6-3 vote, blocking Trump’s attempt to deny automatic citizenship to children born in the U.S. to parents lacking citizenship or permanent residency.
Justice Brett Kavanaugh sided with that majority, yet his separate concurring opinion reads like a strategy memo for lawmakers rather than a simple vote against the White House.
Rather than framing the dispute as a constitutional question, Kavanaugh insisted the case hinged on statutory law already on the books.
He traced the current rule to 1940, when Congress first placed the 14th Amendment’s citizenship guarantee into federal statute, then later absorbed it into the Immigration and Nationality Act of 1952.
Kavanaugh emphasized the sequence of events: lawmakers acted after the Supreme Court’s 1898 decision in United States v. Wong Kim Ark, the case that cemented automatic citizenship for most people born on American soil.
By legislating afterward, Congress effectively locked that judicial interpretation into law, he argued.
That distinction mattered for Trump’s case. Kavanaugh concluded the president had no power to unilaterally rewrite a statute through executive order.
But he opened a door for the legislative branch, suggesting Congress itself retains the authority to carve out new limits on birthright citizenship for children of parents residing in the country illegally or temporarily.
“Congress could — consistent with the Fourteenth Amendment—amend §1401(a) or otherwise enact new legislation establishing exceptions to birthright citizenship for children born to foreign citizens unlawfully or temporarily in the country,” Kavanaugh wrote.
He went further, noting that mass illegal immigration and the ease of international travel today bear little resemblance to conditions during the Reconstruction era when the amendment was ratified.
Those modern realities, he argued, justify new categories of exceptions alongside the long-established ones for diplomats’ children and offspring of occupying enemy soldiers.
“Those two categories of foreign citizens—namely, those unlawfully or temporarily in the country—are relevantly similar to the four categories of persons recognized as exceptions in Wong Kim Ark,” he wrote.
The full court did not adopt Kavanaugh’s underlying theory. Still, Republican leaders wasted little time pivoting toward legislative action, framing Congress rather than the presidency as the correct battleground going forward.
House Speaker Mike Johnson addressed reporters shortly after the decision was released, arguing the citizenship guarantee has been misused and signaling support for a formal constitutional fix.
“It’s one of those things that was intended to serve a noble and important purpose and has been thwarted and overused and abused,” Johnson said. “I’m sure that the conclusion from this decision is you have to amend the Constitution to fix that.”
Senator Rand Paul used the ruling to revive his own amendment proposal, which he first introduced months prior, telling colleagues the moment demands action.
“I introduced a constitutional amendment months ago, actually, to fix birthright citizenship,” Paul wrote on X. “After the Supreme Court decision, that amendment matters more than ever. I’m asking my colleagues to take it seriously and help me get this passed.”
Senator Mike Lee issued a similar call to arms on the same platform, framing the fight in terms of border enforcement and legal accountability.
“The long fight for a constitutional amendment begins now,” Lee wrote. “We must explicitly exclude foreign nationals who break our laws, violate our borders, or exploit loopholes to make their families American.”
Trump, meanwhile, rejected the idea that a constitutional amendment is even necessary, urging lawmakers to move directly through ordinary legislation instead.
“No long and unwieldy Constitutional Amendment is necessary!” Trump posted on Truth Social. “Congress should start TODAY to work on ending expensive and unfair to our Country, Birthright Citizenship. They will have my Complete and Total Support!”
Multiple bills already sit before Congress on the issue, among them Senator Tom Cotton’s Constitutional Citizenship Clarification Act and separate birth-tourism proposals from Senators John Cornyn and Rick Scott.
The Justice Department signaled its own shift in approach following the ruling, announcing intentions to combat birth tourism through visa fraud prosecutions rather than continued attempts to enforce the blocked executive order.
Legal scholars warn Kavanaugh’s suggested path carries no guarantee of success. A separate 5-4 majority held that the citizenship clause itself constitutionally protects birthright citizenship, meaning fresh legislation would almost certainly draw immediate court challenges.
Notre Dame law professor Haley Proctor pointed to uncertainty even among dissenting justices about the ruling’s permanence.
“Justice Thomas says in the final paragraph of his dissent that he’s not confident that the decision is going to stand the test of time, so it could well be that the court would revisit it if Congress were to take the steps that Justice Kavanaugh describes,” Proctor told Fox News Digital. “This is an important decision. I don’t think the court’s going to revisit it lightly, and the only sure way to get a new answer here would be to amend the Constitution.”
Kavanaugh has taken a similar approach before. In a recent tariff dispute, the court ruled Trump lacked authority under a federal emergency law to impose sweeping duties, yet Kavanaugh again framed the defeat as a matter of using the wrong legal tool rather than an unlawful goal.
“The Court today concludes that the President checked the wrong statutory box by relying on IEEPA rather than another statute to impose these tariffs,” Kavanaugh wrote, pointing toward alternative trade laws capable of producing similar results.
Trump later praised Kavanaugh as his “new hero” in a Truth Social post following that earlier ruling.
