Been there done that:
The Immigration Reform and Control Act (IRCA or the Simpson–Mazzoli Act) was passed by the 99th United States Congress and signed into law by President Ronald Reagan on November 6, 1986.
The Immigration Reform and Control Act altered U.S. immigration law, making it illegal to knowingly hire illegal immigrants and establishing financial and other penalties for companies that employed illegal immigrants. The act also legalized most illegal immigrants who had arrived in the country prior to January 1, 1982. Despite the passage of the act, the number of illegal immigrants in the United States rose from 5 million in 1986 to 11.1 in 2013
Not 11.1 million.
That is a Pew number used by the media and politics.
The real number is 25-40 million. (Bear Sterns, Yale, other legitimate studies).