lawsuit and also examine the legal arguments on both sides, and why hasn't the federal government passed immigration reform? later we delve into the politics and the push for legislation. we begin with casey wian with the details of the lawsuit. >> reporter: tony, the effort, the fight over arizona's effort to make illegal immigration a crime in the state has now moved to the federal courts. from the moment arizona governor jan brewer signed a controversial law expanding local police powers to crack down on illegal immigrants and their employers, a white house legal challenge seemed inevitable. following 12 weeks of protests, boycotts and threats, the justice department is suing to block sb-1070 before it takes effect on july 29th. eric holer said setting immigration policy and enforcing immigration law assessment a national responsibility. seeking to address the issue