Politico weighs in on the problem in California created by 2018 election drop outs Issa and Royce. At issue is the mathematics of the jungle primary, where a crowded Democratic field facing two Republicans in the June primary may dilute the odds of Democrats making it to the final ballot in November:

In key House races, Republican candidates might be the only names on the ballot in November.

By DAVID SIDERS

FULLERTON, Calif. — Democrats who cheered the retirement announcements of Reps. Darrell Issa and Ed Royce last week are sobering up to a new fear: A potential nightmare scenario in which no Democratic candidate ends up on the November ballot in either seat, dealing a blow to the party’s efforts to retake the House.

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