Today's installment of campaign-related news items from across the country.
* And speaking of the Grand Canyon State, Arizona will host statewide primaries tomorrow, with many observers keeping an eye on the competitive Republican Senate primary, in the race to replace retiring Sen. Jeff Flake (R). The Republican incumbent yesterday told NBC News he isn't endorsing any of the far-right candidates vying for his party's nomination.
* It's also Primary Day tomorrow in Florida, where the two most closely watched races are both parties' gubernatorial contests.
* Democratic National Committee members formally approved a major reform to the party's presidential nominating process, including changes to the role of superdelegates. Going forward, superdelegates will not have a vote on the first ballot at the nomination convention.
* In the new NBC News/Wall Street Journal poll, Democrats have an eight-point lead over Republicans on the generic ballot, 50% to 42%. This is roughly in line with the averages from most recent polls.
* It took a while, but Republican Troy Balderson has been named the winner in the recent congressional special election in Ohio's 12th district. It looks like Danny O'Connor (D) ended up losing by about 1,600 votes, which is just a bit more than the vote total for Joe Manchik, the Green Party candidate in the race.
* And though both parties are gearing up for important midterm elections in 70 days, the Associated Press reports that some Democratic Party officials have begun preliminary discussions with television networks about presidential primary debates that will -- believe it or not -- be held next year.