Editor’s note: The presidential nominating contests in both parties will come down to the California primary.

For Democrats, 548 delegates are at stake — 11.5% of the total. For Republicans, 172 delegates are at stage — 6.9% of the total. Of those, for Democrats, 158 (29%) are divided proportionally on a statewide basis, while 317 (58%) are divided proportionally by congressional district, with each district providing between 5 and 8 delegates. The remaining 73 (13%) are “superdelegates.”

For Republicans, 13 (8%) are awarded statewide, with ten going to the candidate with the highest number of votes on a winner-take-all basis, and three going to “pre-determined” delegates (the State Chair, National Committeewoman, National Committeeman). Meanwhile, 159 (92%) are awarded by congressional district on a winner-take-all basis, with each district providing 3 delegates.

The result: a district-by-district battle in both parties, which we preview for you here.

CA-26: This picturesque district includes the wine country around Oxnard and the super-commuters of the far western stretches of the 101, which runs through the San Fernando Valley to Los Angeles. Moderate Democrat Julia Brownley fought off a tough challenge in 2014 to hang onto her seat. There were also demonstrations in 2014 at a local naval base against deporting unaccompanied alien minors who had crossed the Mexican border illegally.

Prospects:

Democrats: The mixed economic and demographic profile of the district should provide support for both candidates.

Clinton 3, Sanders 3

Republicans: Cruz will run well in the 26th, but may fall short thanks to the military vote, which will go for Trump.

Trump 3, Cruz 0, Kasich 0

Joel B. Pollak is Senior Editor-at-Large at Breitbart News. His new e-book, Leadership Secrets of the Kings and Prophets: What the Bible’s Struggles Teach Us About Today, is on sale through Amazon Kindle Direct. Follow him on Twitter at @joelpollak.