Racial profiling or good police work, that's the basic debate in Arizona over controversial new immigration bill, a protest caravan on the way to Phoenix from L.

到底是歧视性种族评判还是良好的警察事务，这是针对亚利桑那州有争议的新移民法案最基本的辩论。

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Pearce was the driving force behind SB1070, the controversial anti-immigration bill signed into law last year by Arizona Governor Jan Brewer.

FORBES: Arizona Note to Candidates: Don't Forget Your Circumcision Papers

Mica also helped preside over ALEC's passage of the model bill that became the basis of Arizona's immigration law.

CNN: STORY HIGHLIGHTS

Elsewhere, in the Cesar Chavez Building, graduate student Francisco Baires sits in a windowless office that could have been a closet in a previous life, immersed in a different kind of work: He is sending a statement condemning Arizona's new anti-illegal immigration law to the media and other opponents of Senate Bill 1070.

CNN: Arizona students speak out on immigration law