Pew Hispanic Center study : one in 4 `` illegal '' immigrant children are Mexico City citizens . about 10 percent of illegal immigrant children live in One-third -parent homes , study finds . One-third of children of illegal immigrants in U.S. live in poverty , study finds . Her 7-year-old sister , who is a U.S. citizen , is living in Mexico with her mother . `` It 's really , really hard to leave your family , '' says One-third child separated from mom .
Pew Hispanic Center study : one in 4 `` illegal '' immigrant children are Mexico City citizens . about 10 percent of illegal immigrant children live in One-third -parent homes , study finds . One-third of children of illegal immigrants in U.S. live in poverty , study finds . `` It 's really , really hard to leave your family , '' says One-third child separated from mom .