The Constitution is a stronger bulwark than Congress’ laws. If you think Congress can end birthright citizenship, because the Constitution leaves to Congress the right to define the jurisdiction of the United States, then birthright citizenship can be narrowed anytime by an act of Congress. 1/

I think most commentators believe the Constitution protects birthright citizenship *from* Congress, though. (I think so as well. I just think it doesn’t protect it from our rogue Supreme Court, who has done much worse to the plain meaning of the Constitution already.) /fin