Special to CNN
The latest constitutional amendment being floated by some Senate Republicans - to deny citizenship to children born in the United States to unauthorized immigrants - is not new.
Calls for modification of the 14th Amendment's birthright citizenship guarantee have appeared during other moments of immigration-related hand-wringing. The question is whether the idea is a good one.
And the reform is not unthinkable from a democratic point of view. In fact, the United States and Canada stand apart from other major immigrant-receiving societies in the breadth of birthright rules. The United Kingdom amended its laws in 1981 to provide that only children born to citizens, or permanent residents born in the U.K., are citizens at birth.
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