People have a right to American citizenship if they were born in the US. It's important to remember the constitution was amended to give that right after the Civil War, when slaves were freed. Trump is trying to erase a law that protected African Americanshttps://www.bbc.com/news/world-46034989 …
The 1898 case involved parents who were legal immigrants to the United States. Trump may be trying to create a scenario where someone who was born to undocumented parents in the United States has to sue for their citizenship. Then the Supreme Court would revisit the decision.