Judge Hears Arguments On Government's Immigrant Crackdown

A federal judge in San Francisco will hear arguments today in a suit attacking the U.S government's plan to crack down on undocumented immigrants.

The plan allows the government to tell employers they'll face penalties if they keep workers whose Social Security numbers don't match their names.

The U.S. district court judge could give the Social Security Administration and the Department of Homeland Security permission to start sending the so-called "no match" letters to businesses.

But the court could also extend the temporary restraining order that would prohibit the letters from going out until the case can be heard in court.