The new orders came weeks after the U.S. Supreme Court, in a 6-3 ruling, rejected the president’s previous efforts to end birthright citizenship for undocumented citizens through executive orders. During an Oval Office event, Mr. Trump told reporters that the June 30 Supreme Court ruling was a “very, very unfortunate decision.” “This was done right after the Civil War,” Mr. Trump said of the constitutional amendment granting automatic citizenship to infants born in the United States. Mr. Trump has criticized birthright citizenship for years, using it as a political tool as he has repeatedly tried to restrict legal immigration. And in an unusual move, he attended oral arguments in the birthright citizenship case at the Supreme Court, a presidential first.