Sixty percent of Americans support the Arizona law, according to the most recent ABC News/Washington Post poll. But fewer -- 46 percent -- think the states should have power to make and enforce their own immigration laws, one criticism of the Arizona statute.
The Arizona measure has spurred other states to seek to enact similar laws restricting illegal immigrants. More than 1,100 immigration-related laws have been introduced in state legislatures this year, according to the National Conference of State Legislatures. Three hundred fifty-three such laws passed in the states in 2009.
Judge Bolton's decision could have reverberations across the country. A ruling in the government's favor could call into question the constitutionality of other state immigration laws.
Upholding Arizona's law, however, could open the door for more state challenges in areas of federal government responsibility.