Table: us_elections
Columns: district
incumbent
party
first_elected
result
candidates

Question: Who was running for office in the California 10 district?
SQL: SELECT "candidates" FROM us_elections WHERE "district" = 'California 10'

Question: How many parties won the election in the California 23 district?
SQL: SELECT COUNT("party") FROM us_elections WHERE "district" = 'California 23'

Question: What republican candidate was first elected most recently?
SQL: SELECT MAX("first_elected") FROM us_elections WHERE "party" = 'Republican'