A VERY quick search in Google (you know google, right?) using the key words "illegal immigrants worked for trump". It took me about 3 minutes to copy and paste the links below. There are THOUSANDS of them. Have a look at google

What Donald Trump Knew About Undocumented Workers at His Signature Tower
http://time.com/4465744/donald-trump-undocumented-workers/

Trump Hired Polish Illegal Immigrants to Build Trump Tower
http://www.weeklystandard.com/trump-hired-polish-illegal-immigrants-to-build-trump-tower/article/2001294

Trump’s Dirty History of Hiring and Exploiting Undocumented Workers
http://www.politicususa.com/2016/09/02/trumps-dirty-history-hiring-exploiting-undocumented-workers.html

Report: Trump Actively Sought Out Illegal Immigrants to Work on Trump Tower
http://www.mediaite.com/print/report-trump-actively-sought-out-illegal-immigrants-to-work-on-trump-tower/

Donald Trump Turned Down 94.4 Percent of American Job Applicants, Applied for Hundreds of ‘H’ Visas Instead
Read more at: http://www.nationalreview.com/corner/431908/donald-trump-immigration-hypocrite-who-ignores-american-workers

Donald Trump allegedly worked illegal immigrant models like 'slaves' say former employees
http://www.ibtimes.co.uk/donald-trump-allegedly-worked-illegal-immigrant-models-like-slaves-say-former-employees-1578823