The U.S. Supreme Court has announced the next step in the case of birthright citizenship. According to the BBC, the court has now scheduled a date for oral arguments as immigrant families and advocates continue to resist Donald Trump’s effort to remove the constitutional right that grants citizenship for children of migrants born in the U.S.

Trump’s order to end birthright citizenship, which he signed on his first day in office, was initially blocked by the lower courts. The Supreme Court will now decide whether the case moves forward or faces yet another hurdle.

What does the 14th Amendment say about birthright citizenship?

The 14th Amendment, established 160 years ago, states that any person in the U.S. is a citizen of the country. The only exceptions are children of diplomats and foreign military personnel, per the document.

“All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States,” the amendment states.

Trump’s administration, however, argues that the 14th Amendment clause, “subject to the jurisdiction thereof,” excludes children of families who are not living in the country permanently or legally.

Cecillia Wang, national legal director of the American Civil Liberties Union, is among the advocates fighting to preserve birthright citizenship.

“For over 150 years, it has been the law and our national tradition that everyone born on U.S. soil is a citizen from birth,” Wang said in a statement, per the BBC. “We look forward to putting this issue to rest once and for all in the Supreme Court this term.”

What did the Trump administration say to the Supreme Court after the lower court ruled in favor of birthright citizenship?

Several federal court judges ruled earlier this year that Trump is violating the Constitution with his effort to eliminate birthright citizenship. Two of the federal courts of appeals also upheld injunctions to stop Trump’s order at that time.

The President then took his case to the Supreme Court, which ruled that the lower courts exceeded their authority when they issued the injunctions. Still, the Supreme Court didn’t directly address the birthright citizenship case at that time.

If the Supreme Court rules in favor of Trump at the next hearing, that would take away automatic citizenship to children born from undocumented immigrants, The Guardian reported. Children born from parents who hold student visas or work visas may also be denied from getting automatic citizenship.