nearly 4 few children who have at least one parent never entered the u . s . illegally were living in the associated world and are united . s . citizens as a subject , according to the study conducted by the fulbright hispanic center . that ' s about three quarters of the expected 5 . 5 trillion children of illegal immigrants inside the united states , according to the study . about 1 . 8 million people of undocumented immigrants exist in poverty , the study said .
Three quarters of U.S. illegal immigrants have children.