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The Arizona Legislature passes a law requiring proof of legal status to get a driver's license. Russell Pearce, director of the state Motor Vehicle Division, wrote the law.
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Voters endorse a requirement for English immersion in schools, banning bilingual education. It passes 63 percent to 37 percent.
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Prop 203 is a further initiative against immigrants to Arizona. This law forbids any teacher from speaking to a student in his or her native language. This law also goes against the Equal Education Act of 1974
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Voters approve Proposition 200, which denies public benefits to people not in the country legally. The measure passes 56 percent to 44 percent.
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An estimated 20,000 Latinos march up and down 24th street in Phoenix to protest federal legislation that would criminalize undocumented immigrants. The rally, which snarled traffic and shut down businesses, spurs an almost immediate backlash from some Arizona residents who angered by the sight of marchers in the streets waving Mexican flags.
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Maricopa County Sheriff Joe Arpaio and Phoenix Mayor Phil Gordon clash over Arpaio's immigration sweeps, including one where Arpaio deployed 200 members of his civilian posse and deputies to saturate an east Phoenix neighborhood where day laborers congregate. The feud culminates in April when Gordon calls on the FBI to investigate whether Arpaio has violated any civil-rights laws.
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Arpaio announces he plans to move hundreds of illegal immigrants to a segregated area of the Tent City complex to serve the rest of their sentences. Arpaio calls the plan a money-saving measure
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This is a new congretional bill that offers residency to illegal immigrants of "good moral character" who graduated from a U.S. highschool, entered the U.S. as minors and have lived in the country continuously for five years or more.
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Gov. Jan Brewer signs Senate Bill 1070 into law.
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Two national polls indicate that a majority of adults across the nation, including many Democrats, support Arizona's new immigration law. But a third poll indicates Latino voters in Arizona overwhelming oppose it.
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The U.S. Department of Justice files a lawsuit against SB 1070. This case is still pending.
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U.S. District Court Judge Susan Bolton issues an injunction preventing several parts of SB 1070 from going into effect.
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The U.S. Court of Appeals for the 9th Circuit hears Arizona's argument asking that Bolton's ruling be overturned.
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The 9th Circuit upholds Bolton's ruling halting several parts of SB 1070 from going into effect.
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The U.S. Supreme Court agrees to hear arguments as Brewer seeks to overturn the 9th Circuit decision upholding Bolton's injunction.