You know, before 2008 when McCain & Co. were floating an amnesty scheme, the est'd # of illegals was reported somewhere north of 20 million, more like 24 million, & the line was "we can't round them all up". Of course the housing crash happened since then. Did that many illegals "self-deport" because the jobs vanished? 11 mil might be a more manageable #, esp. if we don't let proclaimed illegals address the public with impunity.
What we really need to address is BORDER SECURITY as distinct from immigration or illegal aliens per se. It is a critical issue in itself; we cannot tolerate unguarded borders that hostiles, criminals, & even terrorists, as well as clandestine job-seekers , can slip thru with little trouble.