I suppose it is remotely possible but not probable that Congress is going to change birthright citizenship.
So says you.
BTW. We have had this discussion already. In case you forgot, I'll include Tancredo's text.
(D) sign a legally enforceable affidavit attesting that they--
`(i) understand that they will not be permitted to change or adjust to any other immigrant or nonimmigrant classification or status while present in the United States;
`(ii) acknowledge that a child born to them during their stay in the United States will not be granted U.S. citizenship unless the other parent is a U.S. citizen or lawful permanent resident;
Without an Amendment, I don't possibly see how that could be Constitutitonal.