That's a universal immigration law, not just the US. However, the idea of building a wall to enforce this is where opinions differ.
Consider, for example, the European Union. There, member states have open borders with each other under the Schengen Agreement, yet they maintain their sovereignty and regulate immigration. They focus on effective policies and cooperation rather than physical barriers.
Do you think a similar approach could work for the US, perhaps through better cooperation and policies with our neighboring countries?
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