Rep. Keith Ellison: ‘If They Can Ban Muslims, Why Can’t They Ban Mormons…?’ Cybercast News Service, by Melanie Hunter Rep. Keith Ellison said President Donald Trump’s 90-day ban on immigration from seven predominantly Muslim countries is “a religiously based ban,” and “if they can ban Muslims, why can’t they ban Mormons.” “It is a religiously based ban, which is something that our — our Constitution says Congress shall make no law establishing a religion or abridge the free exercise thereof.