INTRODUCTION After the World War II came to an end, the result and consequences are still present, it left many countries in a desolation and its people homeless and jobless. This lead people to immigrate to the United States under refugee status. However, as stated in the Displaced Persons Act, they did not represented a threat to Americans’ housing or jobs. The war destroyed many political groups but also gave birth to other, such as Communism; this led to the Cold War between the United States and Russia. Since accepting communists threatened the nation’s integrity, the McCarran- Walter Act was passed to prohibit people of certain political beliefs from immigrating. The political problems of this time period also created economic problems in many countries and resultantly produced an immigration nightmare for the United States. The mid-1900s was a time of vast immigration resulting from political and economic problems throughout the world. And through history the US response to this immigrate waves has been through policies, immigration policies more specific. The US immigration policies have past trough great and significant changes since the 20th century. To this has contributed not only the WWII and the Cold War, but as well political problems, poverty, lack of jobs, and in changing policy. This is no matter the location or the period of time, the push and pulls have always and will always exists, there will always exist poor third world countries that cannot a good environment for their society live and prosper in their homeland. The United States has changed its immigration policy many times in the last 100 years and in 2010 a new and controversial immigration bill arrive in the US Congress, the Support Our Law Enforcement and Safe Neighborhoods Act or commonly known as Arizona SB1070. This is a legislative Act of the state of Arizona that at the time it has announced back in 2010 was the view and explained as a strictest anti-illegal immigration measure in a long time. The New York Times described as “toughest bill on illegal immigration into law.” This bill is a legislative Act in the state of Arizona that at the time of passage in 2010 was the broadest and strictest anti-illegal immigration measure in a long time. This research will explore how this bill works, how it was the reaction of the society, the public option and position, the effects in society and in the economy, and to finish what will be the challenges this law will encounter its legality and constitutionally. I. LITERATURE REVIEW Research and studies about Arizona immigration law examine the effect of the increasing immigration of the United States, focusing on demonstrating how immigration to this country has played a key role in the development of the nation in the social, political and economic aspects. Arizona Bill 1070 (SB 1070) had and still is calling national attention on the relationships between federal, state, and local governments to enforce immigration law. In a lawsuit against the State of Arizona, the United States seeks to enjoin much of SB 1070 on preemption grounds. The federal challenge, which the U.S. Supreme Court may ultimately decide, has provoked renewed interest in the appropriate scope of federal immigration power and the permissible role, if any, of states and localities in impinging upon that power Complaint, United States v. Arizona, 703 F. Supp. 2d 980 (D. Ariz. 2010) (No. 2:10 Civ. 1413). In addition to the federal suit, a coalition of civil rights groups has challenged the law on preemption and other constitutional grounds. See Order, Friendly House v. Whiting, No. CV 10-1061-PHX-SRB (D. Ariz. Oct. 8, 2010). The impact of S.B. 1070 on the criminal justice system of Arizona-the duties and powers of Arizona law enforcement and prosecutorial authorities, and the relationship of the state legislation to federal law and policy-are being described in commentary and in cartoons. But many descriptions have little to do with the text of the bill, with the relevant background legal principles, or with plausible policy and interpretations. (Chin et al, 2011). The bill creates many new crimes and duties, some of them previously unknown not only in Arizona, but also in federal or state law. To understand the legal issues raised by this bill requires the expertise of one-half of a law school faculty, because issues arise about both structural and substantive constitutional law, immigration law, criminal law, criminal procedure, state and local government law, and other fields. S.B. 1070 includes many provisions that are open to a range of interpretations (Chin et al, 2011). Arizona’s immigration laws have hurt its economy. SB 1070’s enforcement policies outside of the workplace drove many unauthorized immigrants from the state, lowered the state’s population, hobbled the labor market, accelerated residential property price declines, and exacerbated the Great Recession in Arizona (Nowrasteh, 20