Keep Nine Amendment would enshrine in the U.S. Constitution a provision to keep the number of Supreme Court justices at nine members.

The justices offered few public remarks on birthright citizenship, but legal experts expect them to reject Trump's executive order.

Attorneys general from 22 states sued President Trump today to block a new executive order he signed declaring that children born to undocumented immigrants would no longer be treated as citizens. The order would extend even to the children of some mothers who are in the country legally but temporarily,