Since his first House campaign a dozen years ago, would-be Arizona Sen. Jeff Flake has worked diligently to cast himself as a conservative gadfly, willing to buck GOP leaders and even a Republican president.

A poll released Thursday shows likely Republican Presidential candidate Mitt Romney soundly defeating President Obama in Arizona. The poll of 909 likely voters was commissioned by a Republican consultant and conducted by a Republican pollster in response to two polls ...

Faced with an uphill campaign against a primary opponent handpicked by the president and backed by the national Democratic establishment, Don Bivens on Wednesday dropped out of the U.S. Senate race, clearing the field for former Surgeon General Richard Carmona.

U.S. Senate hopeful Wil Cardon is launching a $230,000 television ad campaign in his bid to upset frontrunner Jeff Flake in the GOP primary, though the announcement hit a brief snag thanks to a spelling error.

Don Bivens used the first television ad of Arizona’s U.S. Senate race not to attack his Democratic primary rival, but to go after GOP frontrunner Jeff Flake.

For Tempe-based pollster Michael O’Neil, there are elections and then there are “real elections.”

He believes the race this year for the seat being vacated by Arizona Sen. Jon Kyl falls into the latter category.

If there is one thing the four major candidates for Arizona’s U.S. Senate seat can agree on, it’s that Arizonans don’t want to elect a business-as-usual politician this November.

Tucson defense contractor David Crowe formally kicked off his campaign against U.S. Rep. Raul Grijalva in Tucson on Wednesday.

Arizona Democratic Party headquarters is sparsely populated these days after most of its employees left for congressional and U.S. Senate campaigns.

Congressman Jeff Flake continued his fundraising dominance in the U.S. Senate race, reporting $607,000 raised in the fourth quarter of 2011.