The Trump administration has asked the Supreme Court to uphold its executive order ending birthright citizenship in the US. The order has been blocked from taking effect by lower court judges after a series of lawsuits which argued it was unconstitutional. But in June, after a challenge brought by Trump officials, the Supreme Court ruled that a federal judge cannot block a presidential order. The justice department has asked the Supreme Court to take up and resolve the case in its new term, which starts on October 6. According to Pew Research, about 250,000 babies were born to unauthorised immigrant parents in the United States in 2016 – a 36% decrease from a peak in 2007.