Andy Tobin won 36 percent of the votes; Kiehne took 35.
Several misconduct investigations hurt the incumbent.
So-called “conservative slate” defeats Vernon Parker and Lucy Mason.
She'll face former Arizona Attorney General Terry Goddard in the general election.
They will face Democrats Jim Holway and Sandra Kennedy in the general election.
A collection of political stories from across the state
Political news and gossip here in the Old Pueblo
Reporters talk about the money and the hot topics in the race.
3 chances to meet people who want to represent you in Congress
Voters will choose between political experience and business experience in District 11.
Five Republicans also discuss Common Core standards.
Voters had a right to take redistricting away from the Legislature, lawyer says.
Candidates comment on Medicaid, job training, public lands, budget cuts, and immigration.
Winner will face Kirkpatrick in one of the nation's most competitive races
Polak thanked supporters in a withdrawal announcement on Facebook.
The Congressional District 3 Republican primary race was jumbled this week as one candidate dropped out and another jumped in.
There have been major changes in the Congressional District 3 race scene since Wednesday’s filing deadline.
Damien Kennedy hopes to win the Republican nomination in the August primary election and challenge Democrat Raúl Grijalva for a seat in Congress, but Kennedy has only been a registered Republican for 8 months.
Green Valley Republican Damien Kennedy filed official paperwork to run for Congress in District 3.
Arizona Congressional District 1 candidate Gary Kiehne apologized for a comment he made at a Republican primary debate in Florence on Saturday.