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On paper, Arizona's controversial new immigration law is not that different from the federal version.

A federal judge hearing the six challenges to Arizona's new immigration law says she makes no promises on whether she'll rule on requests to block enforcement of the law before it takes effect July 29.

Republicans denounced the Obama administration's challenge of Arizona's new immigration law Tuesday, a fresh sign they may try to paint Democrats this fall as soft on illegal border crossings.

The U.S. Department of Justice is asking that its lawsuit challenging Arizona's immigration enforcement law be heard by the same federal judge in Phoenix already considering five challenges.

Reaction by advocacy groups, elected officials and others to the U.S. Department of Justice's filing of a lawsuit challenging Arizona's immigration enforcement law:

The Obama administration sued Arizona July 6 to throw out the state's toughest-in-the-nation immigration law and keep other states from copying it. The lawsuit, filed in federal court in Phoenix, said the law usurps the federal government's "pre-eminent authority" under the Constitution to regulate immigration.

Click here to see reactions to the lawsuit

A judge has ruled that a referendum on secret ballots cannot be decided at the November election.

A judge's ruling is now awaited on whether Arizona's general election ballot in November will include a referendum on secret ballots.

A Maricopa County Superior Court judge hears arguments Tuesday on whether Arizona's general election ballot in November will include a referendum on secret ballots.

Sen. John Huppenthal, a Republican who is running for Superintendent of Public Instruction, survived another court challenge and will stay on the ballot.