Trump attended oral arguments on April 1, 2026 -- the first sitting president to do so in U.S. history. The case challenges whether children born in the U.S. to undocumented or temporary parents automatically gain citizenship under the 14th Amendment. The Trump administration relies on the part of the 14th amendment that says citizenship is granted only to people "subject to the jurisdiction" of the US. The Court is expected to rule by late June. A clear majority appeared skeptical of the administration's argument.

1. The Constitution Hasn't Changed (Roberts, Kavanaugh, Barrett, Kagan, ACLU)

Most of the justices don't seem to buy the government's reinterpretation of a plain constitutional text.

Chief Justice Roberts opened with skepticism, asking why the Constitution's straightforward language should be reframed. Roberts said "It's the same Constitution" and called the arguments "quirky" and "idiosyncratic." Justice Brett Kavanaugh pressed the historical point: Congress enacted citizenship laws in 1940 and 1952 using 14th Amendment language without narrowing scope to exclude children of undocumented immigrants. Both Justices Amy Coney Barrett and Neil Gorsuch, Trump appointees, openly questioned the administration's position.

Justice Elena Kagan directly challenged the government's evidence. She told the solicitor general that the constitutional text "does not support you." ACLU attorney Cecilia Wang, a birthright citizen herself (born Oregon, parents from Taiwan), summed up the counterargument: "Ask any American what our citizenship rule is, and they'll tell you, everyone born here is a citizen alike."

2. We're in a New World (Trump, Sauer, Thomas)

The originalist position holds that 14th Amendment language was never meant to cover children of non-allegiant parents.

Trump made clear why he's pushing this. After attending oral arguments, he called the U.S. "STUPID" for having birthright citizenship. His solicitor general Sauer argued that "subject to the jurisdiction thereof" demands "direct and immediate allegiance" to the U.S. -- meaning children of undocumented or temporary residents wouldn't qualify. He cited Elk v. Wilkins (1884) as precedent.

Justice Clarence Thomas sounded the most sympathetic to the reinterpretation. He asked "How does the citizenship clause respond specifically to Dred Scott?" -- a question that suggested openness to the originalist framing. Among the nine justices, only Thomas appeared genuinely inclined toward the administration's side.

The real dispute isn't whether birthright citizenship survives, but how broad the ruling against the government will be.

The lineup was visible from opening arguments. Roberts, Gorsuch, Kavanaugh, and Barrett all posed tough questions to the government. Only Thomas seemed genuinely sympathetic. That leaves Alito and Sotomayor. Sotomayor asked whether the administration sought to retroactively "unnaturalize" existing birthright citizens -- a pointed challenge suggesting she's not with the government.

So it really just comes down to what the scope of the opinion will be. Will the majority simply reject the government's theory, or will it affirmatively protect birthright citizenship against future attacks? Justice Sotomayor's retroactivity question hints that some justices are thinking about the practical damage a narrow ruling could allow. A clean 6-3 or even 7-2 majority seems assured. The question is whether they'll close all the doors the government tried to open.

Where This Lands

The Supreme Court will almost certainly reject Trump's challenge to birthright citizenship. A clear majority of justices signaled skepticism during argument, and even Trump appointees Gorsuch and Barrett questioned the government's position. The only real suspense is whether the opinion will be narrowly tailored to this case or whether the justices will write more broadly to foreclose future attacks on birthright citizenship. That depends on whether the majority wants to send a message that this question is settled, or whether they think a narrower ruling is sufficient. Either way, birthright citizenship survives -- but the margin and the language of the opinion will matter for decades of immigration law to come.

Sources