Calling a revenue-neutral tax conformity bill "irresponsible,'' Gov. Doug Ducey vetoed the measure on Friday − and vowed to reject any plan other than his own.

On the eve of Arizona GOP Chairman Jonathan Lines’ re-election bid, two failed GOP candidates sued him for defamation.

A federal appeals court is going to give Democrats a new chance to argue that an Arizona law banning "ballot harvesting'' is illegal.

Arizona’s prolonged vote count has borne a batch of proposed law changes designed to speed up the process and instill more confidence in the system. It took a week in Arizona for a victor to be declared in the U.S. ...

The Navajo Nation is claiming that the state and several counties illegally discriminated against tribal members and kept them from having their votes counted.

New figures Saturday evening show Democrat U.S. Rep. Kyrsten Sinema has amassed 1,048,655 votes. That gives her a lead over Republican U.S. Rep. Martha McSally that now approaches 30,000.

The latest returns from the state's two largest counties has given Kyrsten Sinema the lead in her bid for U.S. Senate -- barely.

A last-minute decision by the Green Party candidate to drop out of the race for U.S. Senate could provide Democrat Kyrsten Sinema a needed bump.

Gov. Doug Ducey easily brushed off an intraparty challenge from former Secretary of State Ken Bennett Tuesday.

Embattled Rep. David Stringer has picked up an ally in his defense of his comments about the effects of immigration: his Prescott Republican seatmate.