How is it decided how many delegates each state will get at a party’s national convention? Is it based on state population, number of registered party members, some other factor? California’s a huge state, but also a pretty Democratic one – do the Republicans therefor give it comparatively less delegates than its population would warrant?
The best source for answering this type of question is the wonderful “green papers”, which details the Republican and Democratic delegate allocation rules in great detail. Short answer: The Democratic allocation is based on the Democratic presidential vote in the last three presidential elections, while the Republican allocation is based on party success at all levels (president, governor, Congress) within a state.