Not long before President Donald Trump, in his first term, issued his so-called “travel ban” on 13 countries, Somalia-born Abdul Razak Ali Artan drove a Honda Civic into a crowd of fellow Ohio State University students and got out slashing with a butcher knife, injuring 11. Campus police shot the young jihadist refugee to death, ending the Nov. 28, 2016 attack. But this tragedy — and far too many other terrorism cases — would never have happened under Trump’s soon-after installed, falsely named “Muslim travel ban,” which sharply curtailed immigrant and non-immigrant US visas for foreign nationals from Somalia and...