Congressman Ruben Gallego says he won't run for the U.S. Senate, likely avoiding a contentious fight for the Democratic nomination to finish John McCain's last term.

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

A judge has slapped down efforts by Gov. Doug Ducey and the Republican-controlled Legislature to create new exceptions to laws that require disclosure of campaign finance spending.

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. ...

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.

Long hyped as the frontrunner in the Democratic gubernatorial primary, David Garcia cruised to victory Tuesday, earning the chance to take on Gov. Doug Ducey this fall.

Voter registration in Arizona has increased by nearly 58,000 since the November general election even though the next full election cycle is nearly two years away.

A Maricopa County judge has rejected a request from the Arizona Democratic Party to extend voting by two hours in the county.