CREATE TABLE table_203_615 (id DECIMAL, "district" TEXT, "incumbent" TEXT, "party" TEXT, "first\ elected" DECIMAL, "result" TEXT, "candidates" TEXT)

how many democrats were re elected ?
SELECT COUNT(*) FROM table_203_615 WHERE "party" = 'democratic' AND "result" = 're-elected'
SELECT COUNT(*) FROM "table_203_615" WHERE "party" = 'democratic' AND "result" = 're-elected'