More than 40,000 illegal alien criminals from 79 different countries are housed in federal prisons – costing taxpayers millions every year.
The International Prison Transfer program should help to alleviate the problem as it permits willing criminals to transfer back to their country’s prison system. That could be at least a partial solution, but the problem is that many countries simply refused to accept the transfers – and there are no enforcement measures within the treaty.
See Page 2:

Cut off their trade.
Then execute them
Shoot them!
A bullet a piece. After a while they will stop coming here.
Dump them over the border like they have been allowing them to do in reverse.
Build the wall and drop them on the other side .
Too bad their yours even if we have to toss back over the wall….
Shoot them then
I AGREE 100%
Put them in a chain gang and make them build the wall