Donald Trump took the fight over his attempt to restrict automatic U.S. birthright citizenship to the Supreme Court on Thursday as the Republican president's administration asked the justices to narrow a judicial block imposed on this key element of his hardline approach toward immigration.

President Donald Trump’s administration asked the Supreme Court in a series of emergency appeals Thursday to allow him to move forward with plans to end birthright citizenship, elevating a fringe legal theory that several lower courts have resoundingly rejected.