As the Supreme Court hears arguments Thursday on a major Donald Trump policy for the first time in his second term, the president could secure a significant win affecting many of the lawsuits against his administration out of a case that is otherwise widely seen as a legal loser.

For more than 150 years, people who were born within U.S. territory automatically received citizenship – regardless of their parents’ immigration status. President Donald Trump’s January 2025 executive order on birthright citizenship – stating that children born in the U.