Immigration Act of 1917:
America’s last massive immigration ban: 100 years ago. Saturday Evening Post.
‘Immigration Act of 1917’ Turns 100: America’s Long History of Immigration Prejudice. By Mindy Weisberger, senior writer for Live Science.
Immigration Act of 1917. Wikipedia.
Trump’s immigration ban:
Where America’s Terrorists Actually Come From. The Atlantic.
Countries where Trump does business are not hit by new travel restrictions. The Washington Post.