The United States Supreme Court has upheld the constitutional guarantee of birthright citizenship, striking down a core element of President Donald Trump's immigration agenda in a landmark ruling issued on the final day of the court's term. In a 6-3 decision, the justices affirmed that nearly all children born on American soil are citizens at birth, regardless of their parents' immigration status, delivering one of the most significant constitutional rebukes of Trump's second administration.

The ruling centred on an executive order Trump signed on the first day of his second term, which sought to deny automatic citizenship to children born in the United States to parents present in the country illegally or on temporary visas. Federal courts across the country had already blocked the order, and the case ultimately reached the Supreme Court as a class action brought by affected families. Writing for the majority, Chief Justice John Roberts grounded his opinion in a sweeping historical account: tracing birthright citizenship from English common law, through the 1857 Dred Scott ruling — in which the court infamously held that an enslaved man was not a citizen — to the 14th Amendment, ratified in 1868, which established that all persons born or naturalised in the United States and