About what you said regarding Trump going against American Policy, take a look at this file (.doc) if you will and tell me where he is doing this. Presidents have previously used this law to prevent immigrants from coming into the country. Jimmy Carter was one, for example, who kept Iranians from entering the country during the time of the "Iran Crisis" in the late 70s.

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GENERAL CLASSES OF ALIENS INELIGIBLE TO RECEIVE VISAS AND EXCLUDED FROM ADMISSION.doc (54 KB, 2 downloads)
GENERAL CLASSES OF ALIENS INELIGIBLE TO RECEIVE VISAS AND EXCLUDED FROM ADMISSION

The Chestnut Mare