Muslims make up just less than 1% of the U.S. adult population. According to Pew Research Center's 2014 Religious Landscape Study (conducted in English and Spanish), 0.9% of U.S. adult population are Muslims.
A 2011 survey of Muslim Americans, which was conducted in English as well as Arabic, Farsi and Urdu, estimated that there were 1.8 million Muslim adults (and 2.75 million Muslims of all ages) in the country. That survey also found that a majority of U.S. Muslims (63%) are immigrants.
A recent Pew Research Center report estimated that the Muslim share of immigrants granted permanent residency status (green cards) increased from about 5% in 1992 to roughly 10% in 2012, representing about 100,000 immigrants in that year.
For Trump, America should be devoid of Immigrants and then Muslims. Read below a copy of Trump statement to ban all Muslims in America