No one can pose an answer to the presence of illegal migrants, without dealing with illegal immigration - this means a wall and or improved internal policing (proposed British style ID and rewards for those informing and punishments for those complicit). Existing illegal immigrants offered an "amnesty" from the improved policing, if they register. This registration for the amnesty conditional on them meeting the terms for it. Illegals have married American nationals. Illegals have worked in minimum wage jobs (false ID's?) for years and paid taxes. All such gaining amnesty. Those not married to American nationals and not employed in minimum wage jobs, only qualifying for guest worker status.
Russian ministry: Turkey suggests joint working group over Syria ops (Reuters)
from the article: A flood of Mexicans