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From anyone they suspect is undocumented. opponents said it could lead to racial profiling but arizona, home to 460,000 illegal immigrants, those that support it say it's necessary because the federal government has failed to secure the border. casey siegle has the story from phoenix. >> reporter: the fight could just be the beginning. this the toughest immigration reform law on the books in u.s. history. though it's hard telling how long it could last considering the court battles are already brewing. let's go to the video of arizona governor jan brewer signing bill 1070 yesterday. things got...

Proof of citizenship on the spot from anyone they suspect is undocumented. opponents said it could lead to racial profiling but arizona, home to 460,000 illegal immigrants, those that support it say it's necessary because the federal government has failed to secure the border. casey siegle has the story from phoenix. >> reporter: the fight could just be the beginning. this the toughest immigration reform law on the books in u.s. history. though it's hard telling how long it could last considering the court battles are already brewing. let's go to the video of arizona governor jan brewer signin...

Casey siegle streaming live from phoenix this? >> is the toughest reform immigration bill in the country. it's hard to tell how long it's going to last. court battles are brewing. the arizona's governor jan brewer signed 1070 bill yesterday. while that was going, outside look that the video. things getting very heated between several hundred protestors who gathered on the capital lawn. people don nirng riot gear. they are worried that will lead to widespread racial profiling. they can check your status, requesting to see documentation paperwork of suspects on the spot. president obama himself ...

A new ammonia tank. they're set to return to earth monday morning, depending on the weather. he is one of the most popular republicans in the country and leading contender in 2012. find out who mitt romney is endorsing for the governorship of one of the biggest states in the nation. >> casey siegle from the biggest state, california, and it's a very heated governor's race there, isn't it? >> yeah, absolutely. in fact, the governor will not be back as he says, but california democrats hope that one former governor will be and they've come to the los angeles convention center here to rally beh...

California's democratic convention is now underway and all eyes are on the top job. the job that arnold schwarzenegger currently holds, the job of governor. term limits prevent him from running again. a contender, state attorney general jerry brown, likely to face, meg whitman. joining me live from the l.a. convention center is casey siegle. >> hi. sorry if i'm shouting, but there is a giant helicopter roaring overhead. live television for you. the state has been crippled by the recession, as you know, and that has a lot of californians concerned about a number of issues, everything from highe...