The state’s top attorney is reviewing whether a ruling against the Obama administration on “dreamers” last week will help him win one, if not both lawsuits he is fighting.

The nation's high court on Monday gave the Obama administration the chance to defend its “deferred action” programs for immigrants and declined a head-on challenge to them by Sheriff Joe Arpaio.

A first-term lawmaker is pushing legislation he contends will block at least two branches of the federal government from imposing their will on Arizona.

The Arizona Independent Redistricting Commission became a quasi-regular fixture at the U.S. Supreme Court this year as remapping panel defended the work it did and even its right to do it.

A separate redistricting case heard by the U.S. Supreme Court on Dec. 8 has Hispanic congressmen worried it could lead to giving the majority Anglo population a new tool to maintain political control despite changing demographics.

Depending on the outcome of two U.S. Supreme Court cases, Arizona’s legislative districts could see a radical makeover in the coming year, and either or both could spell trouble for Democrats.

The justices of the U.S. Supreme Court gave a skeptical response today to arguments by Republican interests that the lines for the state's 30 legislative districts were illegally drawn.

The fate of Arizona’s legislative map will hinge on whether the U.S. Supreme Court believes the Arizona Independent Redistricting Commission was justified in underpopulating most Democratic districts or overpopulating Republican ones.

The U.S. Supreme Court scheduled oral arguments for December 8 in a case that could redraw the legislative boundaries created by the Arizona Independent Redistricting Commission. A group of GOP activists alleges that the commission illegally overpopulated Republican-dominated legislative districts ...

A ruling Monday from the U.S. Supreme Court could make it harder for state environmental officials to reach settlements with some polluters to clean up hazardous waste sites.