She was defeated by incumbents Karen Fann and Andy Tobin in the Republican primary on August 28, 2012.

Redistricting moved Klein's home into the same district as Senate President Steve Pierce.

As a result, she lost the Republican primary to incumbents Andy Tobin and Karen Fann.

She defeated incumbent Republican David Braswell in the August 24 primary by a margin of 10,846–8,324.

Klein sparked a debate about Arizona's gun laws after allegedly demonstrating her .380 Ruger's laser sight by pointing it at the chest of a reporter during an interview.