CREATE TABLE table_18527 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Which party had Clair Engle as an incumbent?
SELECT "Party" FROM table_18527 WHERE "Incumbent" = 'Clair Engle'
SELECT "Party" FROM "table_18527" WHERE "Incumbent" = 'Clair Engle'