Could Deporting 2 Million Criminals Provoke a War With Mexico ?

Unfortunately that is true. Many of them have already been deported multiple times and many more are simply released to commit more crimes.

SGT Jerrold Pesz - I am not say most are criminals otherwise. Just the ones that do commit other crimes tend to go through cycles.

I believe the intention with a "wall" is to eliminate returns. With a revitalized Border Patrol with a new physical boundary, I see much less illegal intrusion.

LT David Finke - I doubt a wall will have the desired effect, They will go over, under or around it. The Berlin Wall is a great example of how ineffective walls are.