Trump’s birthright citizenship gamble is as dumb as it is dangerous

On Thursday, the Supreme Court heard oral arguments over a case that shouldn't exist in the first place—birthright citizenship, which exists in plain text constitutional language, specifically in its 14th Amendment:

“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.” 

Leaning on this crystal clear language, the Supreme Court in 1898 affirmed that birthright citizenship...