Typical of a liberal document.   First clue is the misuse of the word 'undocumented'.   Most of these people had identity documentation in the country where they legally belong.   So they are documented.  What they lack is the legal authority to be in this country.   Second, the program that allows them to stay in this country and provides illegal documentation to them, was started and continued illegally and unconstitutionally.   So the proper term is illegals.