The Tucson public school system is 57% ethnic Mexican. Most of them are either here illegally from Mexico or their parents came here illegally.

1. Please provide the specific citation for this statistic. Actually, since I don't doubt the first part, please provide an official statistic showing that 29% or more of the students are "either here illegally from Mexico or (whose) parents came here illegally".
2. Please provide the percentage of illegal students vs. the percentage who are US citizens by birth and whose parents may be, or may at one time have been, illegal immigrants.