Rep. Martha McSally won the Republican nomination for Arizona's U.S. Senate seat on Tuesday, setting up a November contest with Democratic Rep. Kyrsten Sinema.

May 30 marked the deadline for candidates to submit petitions to run for legislative, statewide and congressional offices. Unlike in previous election cycles, few legislative races are uncontested.

Hoping to incite a blue wave in Arizona, billionaire mega-donor Tom Steyer will pour at least $2 million into state elections this year.

Claiming they're being ignored by John McCain and Jeff Flake, Republican state legislators took the first steps Tuesday to allowing them -- and not the voters -- to choose who gets to run for the U.S. Senate.

Arizona Republican Congresswoman Martha McSally called on the national GOP to "grow a pair of ovaries" as she launched her bid for the U.S. Senate on Friday, joining the race to replace retiring GOP Sen. Jeff Flake by embracing President Donald Trump and his outsider playbook in one of the nation's premier Senate contests.

While Arpaio had hinted at a run for months, many political insiders doubted his interest in actually running for the seat currently held by Sen. Jeff Flake, who announced last year that he wouldn’t run again.

Our federal tax code is long overdue for a complete overhaul – it has saddled businesses with some of the world’s highest tax rates, deprived families of their earnings, and served as an obstacle to the growth of the national economy.

Upon closer examination, it is evident that the proffered benefits of the tax plan are based on extremely rosy projections of double-barreled economic growth, accruing from massive tax breaks to major corporations and the upper one percent.

Donald Trump remains more popular in Arizona than the nation as a whole. But pollster Mike Noble said it doesn't look like that will help the Republican Party hang on to the Senate seat being vacated by Jeff Flake.

Mario Enrique Diaz came to Arizona as a student with $20 in his pocket, and he has since worked basically every job in politics here. The Democratic consultant is now working as a civilian aide to the Secretary of the Army.