Here's a story from Canada:
The grandson of a woman I know has been traveling back and forth to the states to see his Colombian girlfriend for the past 3 years. She was enrolled in medical school there. She was a doctor in Columbia and was getting an education in the states so she could move there and be a doctor.
After trumps ban came into place, she was visiting Canada and tried to go back to her school. She was detained at the border for 24 hours until the US officials could call her professor and prove that she was in fact a student. After they contacted her professor, they said she could not go to the states again and that she had to go back to Columbia. They wouldn't even allow her to go back and get her things from her home.
There was a civil service here in canada a week later and her grandson married his girlfriend. She is no longer going to continue education in the states and is switching to a Canadian school because she doesn't want to live in a country that doesn't want her.
Columbia wasn't even on the banned list for fuck sakes. I guess she was too tanned for the immigration officers liking.