CREATE TABLE table_2651755_1 (democratic_coalition VARCHAR, together_we_can_do_more VARCHAR)

What is the democratic coalation when together we can do more is sergio castro ( pc )?
SELECT democratic_coalition FROM table_2651755_1 WHERE together_we_can_do_more = "Sergio Castro ( PC )"
SELECT "democratic_coalition" FROM "table_2651755_1" WHERE "Sergio Castro ( PC )" = "together_we_can_do_more"