Trump first sought to end birthright citizenship on the opening day of his second term, prompting immediate legal challenges. The new executive order is narrower than Trump's previous directive struck down by the Supreme Court. "The Supreme Court already decided this issue: Birthright citizenship is guaranteed by the Constitution. Trump first sought to end birthright citizenship on the opening day of his second term, prompting immediate legal challenges. Lower courts blocked the order before it took effect, and the Supreme Court later ruled against the administration, reaffirming broad constitutional protections for birthright citizenship.