Sheriff Joe Arpaio in Phoenix gets attrition through enforcement:
About 16 percent of the 77,000 inmates booked into county jail this year were illegal immigrants. Arpaio believes that by keeping pressure on illegal immigrants, he can drive them from Arizona.
"They're heading south, or they're going to California, but they're sure getting out of Arizona," he said.
"If you can get them out of Arizona, you can get them out of the United States of America little by little. I'm not saying line up the buses, but put the pressure on them.
"Little by little they're going to leave because it's going to be hard to find a job and they're going to go to jail."
