Require Muslim RegistrationMany believe that Trump intends to institute a Muslim registration, for all Muslims in the United States. This stands in contrast to Trump's actual statements, but seems to be a fairly widespread concern.
Update 12-16-2016: In a strange twist, it turns out that there has been a type of Muslim registration program in effect since the Bush presidency. It is called The National Security Entry-Exit Registration System (NSEERS), and it was implemented during GW Bush's term as POTUS. Oddly, President Obama chose to continue parts of the program throughout his presidency, only choosing to end it completely in the last few weeks before transition.