It is more than a Constitutional question. We also have the statuary laws on the books concerning citizenship. Those laws also define legal terms and are subject to being changed. They have to pass the Congress and be signed by the President. The President can’t change them on his own and the Congress can only do it with an overwhelming vote to override a veto.
The wording of the current statutes need to be changed to make them more clear.
In the final analysis, the Constitution trumps them all. it is the supreme authority on our law.