Arizona Senate: Who can compete with Mark Kelly’s money?

The GOP field is also awash with cash... but who will come out on top?

Note: this post was updated on July 9 with new polling data, social media stats, and overall predictions.

Following up on our deep dive into the Oklahoma Senate GOP primary, we’re turning our attention to one of the most competitive contests in the country. Arizona’s Senate race is rated as a pure toss-up by almost every national political expert. Today …