But while such a ban is unlikely to be implemented in a country with freedom of religion, the cheers that followed his announcement at a South Carolina rally are telling.
"I think that we should definitely disallow any Muslims from coming in. Any of them," supporter Charlie Marzka, 75, told CNN. "The reason is simple: We can't identify what their attitude is."
Indeed, the truth about Muslims in America is perhaps surprising -- but not in the way Trump and his supporters might think.
A look at polls and studies conducted in the last few years shows that Muslims have been crucial in helping law enforcement find terror suspects in the United States. Many have served in the military protecting the country against terrorists
. And in many ways, they're a lot like other everyday Americans.
Here's the reality of Muslims in America -- and how it smashes stereotypes:
They are a minuscule portion of the U.S. population
It's difficult to come by hard numbers because the U.S. Census doesn't collect religious data. But the fear of Muslims taking over and imposing Sharia law is unfounded. By some estimates, Muslims make up less than 1% of the U.S. adult population
. By 2050, their numbers will grow -- to 2.1%. Of all the Muslims in America, 63% are exactly the kind Trump wants banned -- immigrants.
They're better educated than most Americans
They have more gender equality
While in many parts of the Muslim world, women are confined to second-class status, that's not the case among American Muslims. Virtually all of them, 90%, agree
that women should be able to work outside the home. American Muslim women hold more college or postgraduate degrees
than Muslim men. And they are more likely to work in professional fields
than women from most other U.S. religious groups.
They've been here since the birth of the nation ...
... and they're not just clustered in big cities
American Muslims live in cities big and small all across the United States. The first mosque built in America was in, of all places, Ross, North Dakota
, back in 1929.
They're as religious as Christians ...
The general perception of Muslims has one thing right: Most Muslims are very religious. About half say they attend the weekly Friday prayers. But that makes them similar to Christians
: About 70% of Christians say religion is important in their lives, and about 45% go to a weekly service.
... but they're not as dogmatic as they are portrayed
Much has been made about fundamentalist Muslims and their strict interpretation of the Quran. But most American Muslims are different. A Pew religious landscape survey found
that 57% of American Muslims say there is more than one way to interpret Islam's teachings. A similar number say many different religions can lead to eternal life.
There have been Muslims involved in terrorism ...
From September 11, 2001, until the end of 2014, 109 Muslim-Americans plotted against targets in the United States. And terrorism by Muslim-Americans killed 50 in the same time period. Contrast that with the deaths from other mass shootings just last year: 136 -- more than twice as many as all the deaths
from 13 years of Muslim-American terrorism.
... but they've also spoken out against it
After every terrorist attack at home and abroad, the refrain rises, "Where is the Muslim condemnation?" American Muslims have spoken out -- and done much more. A Duke University study found more terrorism suspects and perpetrators were brought to the attention of law enforcement by members of the Muslim-American community
than were discovered through U.S. government investigations. And a Pew survey found that roughly half of U.S. Muslims say their religious leaders aren't speaking out enough against Islamic extremism.