One of the first actions Trump took when he moved back into the White House in January 2025 was to sign an executive order revoking the right of children born in the United States to obtain American citizenship, even if their parents are in the country illegally.
The issue has been discussed in several courts and has now reached the Supreme Court.
It is very unusual for a sitting president to be in court, and Trump's presence is seen as a break with precedent.
The verdict in the case is not expected until the summer.
