Geraldo Misrepresents Law in Arizona.

They are not stopping people randomly. They are not stopping people because "they look Latino".
They are investigating criminal behavior. People who are arrested for other offenses, are always asked for identification. If that identification proves that they are not citizens, should we ignore that fact?
If a tractor trailer is filled with people, should the police ignore that?

We could be doing so much more. Many illegal aliens are using some other person's Social Security number. The Social Security Administration has the work places of thousands of people who are the victims of identity theft, and the criminals who are illegally using their social security number. Send a cop to each location and ask for ID. Lock up the guy who is using the fake ID. If he/she is not a citizen, put them on a bus heading to Mexico City.