US Supreme Court has decided to consider legal challenge questioning birthright citizenship.

The US Supreme Court has agreed to take on a pivotal case that challenges a historic constitutional right: automatic citizenship for those born on American soil.

On his first day in office this January, President Donald Trump signed an order aiming to terminate birthright citizenship, but the action was subsequently blocked by the judiciary after constitutional questions were filed.

The Supreme Court's ultimate decision will either uphold citizenship rights for the infants of foreign nationals who are in the US without authorization or on non-immigrant visas, or it will end the provision entirely.

Next, the justices will calendar a session to hear oral arguments between the federal government and the suing parties, which include immigrant parents and their newborns.

A Constitutional Cornerstone

For over a century and a half, the Fourteenth Amendment has established the doctrine that every person born in the United States is a US citizen, with specific conditions for children born to foreign diplomats and personnel of occupying armies.

"Anyone born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States."

The challenged presidential order sought to refuse citizenship to the offspring of people who are whether in the US without legal status or are in the country on temporary visas.

The United States is one of about three dozen nations – primarily in the Americas – that award automatic citizenship to anyone born within their borders.