IRVING, TX - AUGUST 22: Folders with immigrants' applications for permanent U.S. residency sit stacked in the U.S. Citizenship and Immigration Services (USCIS), Dallas Field Office on August 22, 2016 in Irving, Texas. The USCIS processes millions of such "green card" applications every year, with many of immigrant applicants in route to becoming American Citizens. (Photo by John Moore/Getty Images)
