Operation Wetback massively expanded legal immigration. That was the point.
Immigrants themselves weren't even the real target of Operation Wetback. The real target was the farmers who hired them — who had refused to use legal bracero labor until they were forced to. http://www.vox.com/2015/11/11/9714842/operation-wetback
That, from your Vox article, is an important point Trump keeps hidden from his trumpeters.
Kasich was spot on when he said Trump's endorsement of Eisenhower's Operation Wetback was "not an adult argument".
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