On his first day in office, President Trump signed an executive order to end universal birthright citizenship and limit it at birth to people with at least one parent who is a permanent resident or citizen. A federal judge put the order on hold, but if upheld, Trump’s move could upend a 120-year Supreme Court precedent. Stephanie Sy reports on the history and legacy of that case. PBS News is supported by - https://www.pbs.org/newshour/about/funders