US President Donald Trump attended a historic Supreme Court hearing on his bid to restrict birthright citizenship, with justices from across the ideological spectrum weighing the policy's legality.

In a historic first, Donald Trump became the first US sitting president to attend oral arguments at the Supreme Court on Wednesday as it weighed his bid to restrict birthright citizenship. During more than two hours of questioning, justices from across the ideological spectrum assessed the policy’s legality, indicating that the court may be poised to block a key aspect of Trump’s immigration agenda.