Three new polls show Wednesday the race to replace Jeff Flake in the U.S. Senate is pretty much a toss-up.

Congressman Ruben Gallego is considering a run for the United States Senate in 2020, when a special election will be held for the final two years of the late Sen. John McCain’s term.

John McCain's first congressional chief of staff and the former Republican state attorney general is weighing a bid to win his seat when it becomes available again in 2020 -- as a Democrat.

The Senate race in Arizona is shaping up to be a tale of two pivots – Sinema’s transformation over the years against McSally’s more abrupt swing on Trump, the most divisive issue in politics today.

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.

Sen. John McCain has chosen to discontinue medical treatment for brain cancer, the Arizona senator's family said.

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.

A Republican-backed measure to keep Sen. John McCain’s seat off the November ballot should the ailing senator leave office soon failed in the Arizona Senate on Monday.

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

The U.S. Senate voted unanimously March 14 to confirm state Treasurer Jeff DeWit to become NASA’s chief financial officer.