Connecticut Attorney General William Tong announced he would be the "first to sue" if President Trump attempts to eliminate birthright citizenship from the Constitution.
Tong's comments come in the context of Trump's promise to initiate the largest deportation effort in U.S. history during his second term.
The attorney general, a child of immigrants, is committed to preserving citizenship for children born to undocumented immigrants.
Debates arise over whether ending birthright citizenship could be accomplished through an executive order or would necessitate a constitutional amendment.
Trump is expected to prioritize this issue among his early initiatives in office.