Question: Which District has a Party of Republican and a Result of Lost re-election Democratic gain?
SQL: SELECT "District" FROM "2-1431546-2" WHERE "Party" = 'Republican' AND "Result" = 'Lost re-election Democratic gain';

Question: What is First elected that has Republican Party and a Result of Retired Democratic gain?
SQL: SELECT "First elected" FROM "2-1431546-2" WHERE "Party" = 'Republican' AND "Result" = 'Retired Democratic gain';

Question: What is the First elected of California 3?
SQL: SELECT "First elected" FROM "2-1431546-2" WHERE "District" = 'California 3';

Question: Which Incumbent has a Result of Retired Democratic gain?
SQL: SELECT "Incumbent" FROM "2-1431546-2" WHERE "Result" = 'Retired Democratic gain';

Question: Which First elected has a Incumbent of None (New seat)?
SQL: SELECT "First elected" FROM "2-1431546-2" WHERE "Incumbent" = 'None (New seat)';

Question: What is the First elected that has a Republican party and California 4?
SQL: SELECT "First elected" FROM "2-1431546-2" WHERE "Party" = 'Republican' AND "District" = 'California 4';