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Mike Noble

After teasing it for months, former Maricopa County Sheriff Joe Arpaio said he is running for U.S. Senate.

He’ll join a GOP primary for the seat currently held by Sen. Jeff Flake that already includes former state Sen. Kelli Ward. Later this week the primary is expected to include Congresswoman Martha McSally.

Mike Noble, chief pollster and managing partner with OH Predictive Insights, assessed the state of this newly crowded race.