A “total and complete shutdown” of Muslims entering the country, later recast as extreme vetting.

What happened

He signed a ban on travelers from seven mostly Muslim countries on Jan. 27, 2017. Courts blocked the first version and much of the second; the Supreme Court upheld the third, 5 to 4, on June 26, 2018, as “squarely within the scope of Presidential authority.” His side defended it as a national security measure. It applied to listed countries, not to Muslims as a group, and stayed in force until President Biden rescinded it in January 2021.