Sen.-elect Kyrsten Sinema will be sworn into office before Martha McSally, who Gov. Doug Ducey appointed Tuesday to fill Arizona’s U.S. Senate vacancy.

Gov. Doug Ducey has appointed Martha McSally to fill the U.S. Senate seat that Sen. Jon Kyl will vacate at the end of the year.

The former leader of Arizona’s Libertarian Party filed a lawsuit against Gov. Doug Ducey Wednesday, arguing he must immediately hold a special election to fill the U.S. Senate seat formerly held by John McCain.

Supreme Court Justice Clint Bolick urged Gov. Doug Ducey to name Maricopa County Attorney Bill Montgomery to the U.S. Senate just days after John McCain died.

Two-time U.S. Senate candidate Kelli Ward said Monday she'll seek the top post in the Arizona Republican Party and likely forego any effort to seek the late Sen. John McCain's seat in 2020.

Adams, who served through Ducey’s first term, announced on Twitter that he will return to the private sector, although he did not specify his plans.

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.

Gov. Doug Ducey tapped former U.S. Sen Jon Kyl today to fill the U.S. Senate seat vacated by Sen. John McCain. Ducey’s appointment comes the same day as confirmation hearings begin for Judge Brett Kavanaugh, whom Kyl is shepherding through ...

Photographer Timon Harper was listening to NewsTalk 550 KFYI one morning and heard Sen. John McCain say he was eyeing a presidential run. It was the late-1990s.