The US Supreme Court has heard oral arguments on whether some children born in the US have a constitutional right to citizenship.

Donald Trump attended for part of the hearing – the first sitting US president to attend oral arguments in the chamber.

Some Supreme Court justices seem to be signalling scepticism of the administration’s argument – writes our Washington correspondent.

It is the most significant case of the court term, stemming from an executive order signed by Trump on his first day back in office.

The order sought to end automatic US citizenship for babies born in the United States to parents who are in the country illegally or temporarily.

Opponents say Trump’s order violates the US Constitution’s 14th Amendment – ratified in 1868 – which says that “all persons born or naturalised in the United States, and subject to the jurisdiction thereof, are citizens of the United States”

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