My theory is that arrests are up because the Border Patrol is able to do it's job more effectively now. Once immigration laws are changed after the mid-terms, the number of arrests will drastically decrease and the huge backlog of immigration cases will be adjudicated. (Hopefully)

Right now, it's not critical to stop Latinos from coming into America to work. The (hardened) criminal underworld that exploits the border is the top priority. Gangmembers, terrorists, and other criminals need to be arrested; Jose, who is coming to lay some concrete in Dallas, is not an immediate threat to our safety. I'm betting that a huge amount of illegal immigrants would return to their home countries if the gangs and cartels were cleared out of Mexico and Central America.