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-19: This district takes in the southern end of Silicon Valley and the city of San Jose. Former San Jose mayor Chuck Reed is a moderate Democrat who pioneered pension reform in the state, and is leading a ballot initiative on the subject in 2016. The majority-minority district has large Hispanic and Asian populations, and liberal Democrat Zoe Lofgren has pushed for a halt to family detention of illegal aliens, among other related left-wing policies.

Prospects:

Democrats: Clinton should have an advantage over Sanders in this moderate, heavily minority district.

Clinton 4, Sanders 2

Republicans: Cruz and Kasich will likely split the opposition to Trump, leaving him to take all three delegates.

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.