Donald Trump proposed a system of religious discrimination for U.S. immigration policy on Monday, advocating a “total and complete shutdown of Muslims entering the United States,” according to a written campaign statement.
The incendiary proposal was swiftly denounced by Trump’s rivals in both parties, and as a policy proposal, it is probably illegal.
“I believe Trump’s unprecedented proposal would violate our Constitution,” said Harvard Law Professor Laurence Tribe, “both the First Amendment’s Religion Clauses and the equality dimension of the Due Process Clause of the Fifth Amendment.”
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Tribe, a constitutional law expert, said Trump’s proposal also conflicts with the Constitution’s general prohibition on religious tests outside of the immigration context. “It would also conflict with the spirit of the No Religious Test Clause of Article VI,” Tribe told MSNBC Monday evening.
Beyond the law, Tribe said it was also notable that using religious discrimination for immigration would be “impossible to administer” and “stupidly play into the hands of extreme Islamic terrorists.”
In the modern era, federal immigration law has generally cited religion to protect and welcome refugees facing religious discrimination by other countries – not to advance discrimination by the U.S. In 1980, for example, Congress passed an amendment to the Immigration and Nationality Act to protect some potential refugees facing “fear of persecution” on account of their “religion,” among other factors.
Earlier in the 20th Century, Congress did set immigration limits based on what are now considered suspect classes, such as excluding immigrants based on race or national origin. Congress repealed racial quotas in 1952, and eliminated quotas based on national origin, which had been in force since the 1920s, in 1965.








