<p>Superintendent Tom Horne has a new opponent in the primary. Why did this candidate jump into the race?</p>

Superintendent Tom Horne has a new opponent in the primary. Why did this candidate jump into the race?

Hour 4: The battle for Arizona's top teacher

<p>Mike Broomhead is an influential thought leader covering the biggest issues in Arizona along with newsmakers from all over the state.</p>

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Mike Broomhead is an influential thought leader covering the biggest issues in Arizona along with newsmakers from all over the state.