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:

Ship back and dump back where they came from and leave em there!
That is why we need to stop them before they come in. Also need to force the issue to send the criminals back.
Airlift and dump them!!
Sling shot them over the wall
Then throw them out of the plane anyway
Ship them to Antarctica!!!!!
Refuses? Dump their asses on the border and dare them to come back. This is why we need the wall and armed patrols.
Send them all back anyways
Ok drop them out of a plane across the border
Give them back anyway!