But a few races are all but decided absent an independent qualifying for the general election ballot or a write-in candidate.

For example, current Rep. Karen Fann, R-Prescott, is the lone candidate from any party for state senate in her legislative district. Ditto for incumbent Democratic senators Olivia Cajero Bedford and Steve Farley of Tucson, Lisa Otondo of Yuma, Katie Hobbs of Phoenix and Lupe Contreras of Avondale.

Republicans Debbie Lesko of Peoria, Bob Worsley of Mesa and John Kavanagh of Fountain Hills also find themselves with a free ride.

And at least one state House race also failed to gather more than two candidates, the number of representatives in each district.

One interesting note is that Republican Clair Van Steenwyk, a resident of Sun City West, has filed to run both for the U.S. Senate and for the U.S. House of Representatives for the seat currently held by Trent Franks.

Matt Roberts, a spokesman for the secretary of state's office, said Arizona law clearly prohibits anyone from being a candidate for more than one state office.