Here are two sentences about every candidate running against incumbent Republicans in Southern California

The path to control of the U.S. House goes through Southern California's Orange County and San Diego, and the field is set for the first stage of the election. Democrats are attempting to unseat three congressional Republicans in contests that have crowded fields and already have sums of cash. In Los Angeles, Democrats are investing in the race to oust a Republican congressman.

Here's a quick look at the candidates who have filed to run in the June 5 primary in the 25th, 45th, 48th and 50th congressional districts and the descriptions that will appear after their names on the ballot, along with brief biographies of each compiled by the Los Angeles Times. The California Secretary of State's office must certify the candidates before they can appear on the ballot.

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25th Congressional District

There are more voters registered as Democratic than Republican in Rep. Steve Knight's district, which stretches from Lancaster and Palmdale in the high desert to Santa Clarita and Simi Valley. Hillary Clinton's 2016 victory