House Speaker Mike Johnson said Congress must take up the issue of birthright citizenship after the Supreme Court rejected President Donald Trump's executive order seeking to end the practice for children born in the U.S. to parents who are in the country illegally or temporarily, according to CNN.

Johnson said he was "very disappointed" with the ruling and argued the decision shifts responsibility to lawmakers to address the issue through legislation or a constitutional amendment.

"I think it subjects the country to serious challenges going forward, and we'll have to deal with it as a Congress," Johnson said.

Johnson also said the ruling leaves little alternative for lawmakers who want to change the policy other than a constitutional amendment.

"I'm sure the conclusion from this opinion is going to be that you've got to amend the Constitution to fix that," he said.

"I will say I'm very disappointed in that outcome," Johnson added.

The Supreme Court ruled 6-3 that Trump's executive order violated the Citizenship Clause of the 14th Amendment, affirming that nearly all individuals born on U.S. soil are entitled to citizenship, according to CNN.

Chief Justice John Roberts wrote for the majority that birthright citizenship is a constitutional guarantee that cannot be altered through executive action and has long been understood as a core protection under the 14th Amendment.

The order, signed by Trump on his first day back in office, would have denied automatic citizenship to children born in America if neither parent was a U.S. citizen or lawful permanent resident, but it was blocked nationwide before it could take effect, according to Newsmax reporting on the decision.

The court's ruling relied in part on longstanding precedent, including the 1898 Supreme Court case United States v. Wong Kim Ark, which affirmed birthright citizenship for nearly all individuals born on U.S. soil, according to that report.

Following the ruling, Trump urged Congress to act quickly, calling on lawmakers to pursue legislation addressing birthright citizenship now that executive action has been foreclosed, according to CNN.