It was quickly overshadowed by the terrorist attacks in Paris, but a plan Ted Cruz unveiled last week was a sign that the 1990s Republican debate over legal immigration levels is back.

The latest sign, that is. Scott Walker implied he would view legal immigration through the prism of its impact on American workers, but was vague about what this meant about the number of newcomers admitted each year and was accused of talking out of both sides of his mouth. His campaign is already over.