Morning Digest: The nastiest GOP primary at last comes to a merciful end

_{The Morning Digest is compiled by David Nir, Jeff Singer, and Stephen Wolf, with additional contributions from the Daily Kos Elections team.}

Subscribe to The Downballot, our weekly podcast

Leading Off

● Primary Night: Arizona's new embrace of swing-state status means it's now home to loads of competitive elections up and down the ballot, and Jeff Singer previews the big primaries to watch on Tuesday. Many of these contests will help determine which party holds power in important offices across the state, though some are just good old-fashioned primaries for safe districts―including one internecine battle that has outdone all others in setting new records for Republican repulsiveness.