Almost no North Koreans travel to the U.S., so why ban them?

https://www.washingtonpost.com/world/almost-no-north-koreans-travel-to-the-us-so-why-ban-them/2017/09/25/822ac340-a19c-11e7-8c37-e1d99ad6aa22_story.html?undefined=&utm_term=.360e561d0f0a&wpisrc=nl_most&wpmm=1

"HONG KONG — President Trump’s extension of his travel ban to North Korea is mostly symbolic and will have little to no effect on Kim Jong Un’s regime, experts said Monday."

"The problem with punishing Pyongyang by stopping North Koreans from traveling to the United States is that very few — almost none — make the trip.

The new executive order suspends “immigrant and nonimmigrant” travel from North Korea to the United States. But people cannot emigrate from North Korea to the United States to begin with.

“They should have checked if there is North Korean immigration before they banned it,” said John Delury, an associate professor at Seoul’s Yonsei University. “Why are you banning something that doesn’t exist?”"

However, there remain about 150-200,000 Japan residents that carry North Korean passports, despite typically being second, third, or fourth generation residents of Japan, and who have never actually been to North Korea. Yet, these people do travel, and seem likely to be affected by the ban.

https://en.wikipedia.org/wiki/Chongryon