Actually, I believe we would only need a law specifying that illegal aliens and birth tourists are not subject to the jurisdiction of the United States.
“It requires ANOTHER CONSTITUTIONAL AMENDMENT REMOVING “ANCHOR-BABY CITIZENSHIP”.”
Anchor Baby citizenship has never been addressed by the SCOTUS. But I think Trump should just use E-Verify to dry up all the jobs. No need to round them up, simply make them unemployed and they will leave provided we cut off all the benefits at the same time.