other things have changed, which have led to him not buying a house."

"But his promise to (voters in the 4th District) was to be there, and he has fulfilled that promise" by renting the apartment and touring the district, she said.

Gosar is often on the road when not in Washington, making stops from the pine forests of Yavapai County to the dusty deserts in Yuma. The district takes at least six hours to drive end to end..

Gosar often jokes that he actually lives in his car.

Tobin was among Gosar's fiercest critics when the congressman switched districts during the 2012 race.

"You don't just move an hour-and-a-half away and say you've always lived there. People in Prescott understand that," Tobin told the state Capitol political-insider publication, Yellow Sheet Report, atthe time.

The highest-ranking member of the Arizona House of Representatives, Tobin was interested in running for the seat. He ultimately chose not to take on a sitting congressman.

Instead, in a strong election year for Republicans, Tobin opted this season to cross boundary lines to the 1st District and go after one-time Democratic loser Kirkpatrick, even if he doesn't own a home.

Up the winding U.S. 89 from Gosar's apartment is Tobin's 3,200-square-foot residence.

The ranch house in the small town of Paulden is surrounded by horse properties. The San Francisco peaks of the 1st District rise in the distance. The boundary line is about a half-hour drive.

Tobin declined interview requests about his residency.

But at the start of his campaign last fall, he told The Republic that he wasn't worried about