In brief
The US Supreme Court will hear a case challenging the constitutional right to automatic citizenship for those born in the United States. This follows efforts to end such citizenship by an executive order from President Donald Trump, which lower courts blocked. The ruling will determine citizenship rights for children born to undocumented or temporarily-visa-holding parents.
The US Supreme Court has agreed to hear a case on whether the century-old constitutional right of guaranteed citizenship for those born in the US will remain.
On his first day in office in January, President Donald Trump signed an order to end birthright citizenship, but the move was blocked by lower courts after it was challenged over its constitutionality.
The Supreme Court's eventual ruling will either back citizenship rights for the children of migrants who are in the US illegally or on temporary visas, or end it.
Next, the justices will schedule a date to hear oral arguments between the government and plaintiffs which include immigrant parents and their infants.
For nearly 160 years, the 14th Amendment of the US Constitution has established the principle that anyone born in the country is a US citizen, with exceptions for children born to diplomats and foreign military forces.
The language of the amendment states: All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States.
Trump's executive order sought to deny citizenship to the children of people who are either in the US illegally or are in the country on temporary visas.
The US is one of about 30 countries - mostly in the Americas - that grant automatic citizenship to anyone born within their borders.
