Most Immigrants Are Here Legally. Most Americans Don't Understand That.

Pew:

Fewer than half of Americans know that most immigrants in the U.S. are here legally. Just 45% of Americans say that most immigrants living in the U.S. are here legally; 35% say most immigrants are in the country illegally, while 6% volunteer that about half are here legally and half illegally and 13% say they don’t know. In 2015, the most recent year for which data are available, lawful immigrants accounted for about three-quarters of the foreign-born population in the United States.