Let's not mince words here. It's a Muslim only ban from these countries. For example, persecuted Christians from Syria will be welcomed according to Donald Trump in an interview.

The repercussions for a permanent ban will be ongoing for years with unpleasant consequences for the United States. Iran has struck a deal with Boeing to purchase 20 billion dollars of new commercial planes. With a permanent ban, how can Iranian pilots and flight crew travel to the United States for training? Iran will likely cancel the deal and turn to Airbus. There goes thousands of manufacturing jobs.