We could boot them out...but the concern is one of violent open warfare on the streets. The political class does not have the stomach right now to deal with the violence that certainly would occur....the Mexicans will fight!
Cant we just TRY to boot them out? Since when has implenting bad ideas EVER stopped our gooberment
Rather than try to do something hard, why don't we try to do something that should be real easy, like cut off any U.S. tax-funded benefits they might be getting?
Pushing this rather than round 'em up would have the additional advantages of hurting Democrats and shrinking government.