Aug 25, 2012 3:20 PM by AP
PHOENIX - Arizona's primary election Tuesday features a spirited race for the Republican nomination for U.S. Senate and heated contests for several U.S. House seats, with outcomes that will set the roster of candidates for the Nov. 6 general election.
The Republican race for Senate pits U.S. Rep. Jeff Flake against businessman Wil Cardon.
Cardon is waging a well-funded but underdog race against Flake. Lesser-known hopefuls Bryan Hackbarth and Clair VanSteenwyk also are in the race.
The winner will face Democrat Richard Carmona. He's a former U.S. surgeon general.
One or both major parties have primary races in all nine U.S. House districts.
Those include the two-incumbent rivalry between freshman Republican Reps. Ben Quayle and David Schweikert in the 6th Congressional District centered on Scottsdale.