About these numbers
Results are unofficial until the LA County Registrar-Recorder certifies them. Santa Monica races, local measures, county contests and the LA County share of statewide contests come from the Registrar's live feed; California totals and legislative district totals come from the Secretary of State. LA County counts ballots in batches and posts updates on a schedule it announces, so the numbers can sit still for hours between updates. Mail ballots postmarked by Election Day keep arriving for a week, which is why close races can move for days.
Sources: LA County election results · California Secretary of State · SMDP Election Central