With the sweep of his pen, President Donald Trump caused the U.S. immigration system to go into total disarray and sowed global chaos and confusion on Friday afternoon. The executive order he signed at 4:42 p.m. suspended all Syrian refugees from entering the country indefinitely, prohibited any other refugees from coming into the country for 120 days, and banned foreign nationals from seven predominantly Muslim countries from visiting the country for 90 days. Refugees and people were caught...