There are 179,000 criminal illegal aliens in the United States....

Much of the recent focus has been on border security and we do need a secure fence on the border, but to solve the problem we have to go round people up, physically escort them to the border and and kick them out. If they come back, we need to lock them up for a long time. 

Via Breitbart:

Hundreds of thousands of convicted criminal immigrants remain at large in the U.S. and a number have gone on to commit additional crimes.
According to a March 2, 2015 “ICE Weekly Departures and Detention Report” obtained by Center for Immigration Studies expert Jessica Vaughan and shared with Breitbart News, there were 168,680 convicted criminal immigrants who had final orders of removal but who remained at large in the U.S.
Another 179,018 convicted criminal immigrants with deportation cases pending also remained at large.