> There are already some limitations on birthright citizenship, for example we do not grant it to children born to diplomats visiting the USA. That's largely b

> There are already some limitations on birthright citizenship, for example we do not grant it to children born to diplomats visiting the USA. That's largely because the US is a signatory of the Vienna convention on diplomatic relations. Children of foreign diplomats born in the United States are not automatically granted citizenship because they are not considered subject to the jurisdiction of the United States.