An RCMP officer checks the documents of two women from Sudan after they illegally crossed the Canada-US border near Hemmingford, Quebec, Feb. 26, 2017. Most of the hundreds of people streaming over the U.S. border into Canada in recent weeks are asylum-seekers, coming from Syria, Yemen, Turkey or Sudan, according to the United Nations' refugee point man in the country.

— Geoff Robins / AFP - Getty Images