There's only one thing required to deport every last one of them - the will.
You left off the last part of the sentence:
"Treason doth never prosper, what's the reason? For if it prosper, none dare call it Treason."
$Trillions are literally being made off of illegal immigration. From no-doc loans to slave labor & voting, to human trafficking, drugs/arms running and everything else in between, the DC cartel and their fellow racketeers are simply raking it in.
If you had a stake in the status quo, how hard would you fight to keep the borders open? What the criminals fear more than the end of their gravy train is an aggressive prosecution regime that could put hundreds of them in jail under RICO statutes.
THIS!