The current interpretation of the 14th amendment is nuts. Cross the border, have a kid, and the kid magically is a US citizen. This forms the basis of one of the most attractive reasons to illegally enter the USA. Few other countries allow this.
The misinterpretation of the clause in the 14th amendment centers around the words “All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside." I would argue that illegal immigrants fail the “subject to the jurisdiction thereof” test and therefore their “born on US soil” kids should NOT be afforded US citizenship automatically.
This is possibly going to be a US Supreme Court case sooner or later. What might the “new” SC decide?