CNN Politics has a list of primaries around the country going up to August…..
May 17: Both parties will select their nominees in two key open seat Senate races this day: Pennsylvania and North Carolina, where GOP Sens. Pat Toomey and Richard Burr are retiring. Elsewhere in the perennial battleground of Pennsylvania, the parties will also pick their nominees in the governor’s race, which is also open due to Democratic Gov. Tom Wolf being term-limited.
May 24: Two especially noteworthy Republican primary battles occur this day. In Alabama, Rep. Mo Brooks has struggled out of the gate, despite winning former President Donald Trump’s endorsement, in the race to replace retiring GOP Sen. Richard Shelby.
Similarly in Georgia, former Sen. David Perdue’s Trump-backed primary challenge to Gov. Brian Kemp has not caught on the way some in the party expected. Georgia Republicans will also vote their candidate to run against Democratic Sen. Raphael Warnock.
June 7: The first Tuesday in June is the busiest day on the calendar, with seven states holding primaries: California, Iowa, Mississippi, Montana, New Jersey, New Mexico and South Dakota. California, which has a top-two primary system, is expected to host several toss-up House races this fall….