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:

Build the wall then it them on the Mexican side done
Any country that refuses tgen stop all emigration frim there. As for those who are here well, all inmates should work for there room and board.
Just send them back.
THEN AS A COUNTRY WE SHOULD BE ALLOWED TO EXECUTE THEM!
Then shoot them because we don’t want them either.
CUT THE CORD.
Give them no choice!
Then start mass deportations…
Fly over drop out
To bad take them to the border and tell them to run any that try turning around shoot them.