CREATE TABLE table_18661 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What party is incumbent Oliver H. Cross?
SELECT "Party" FROM table_18661 WHERE "Incumbent" = 'Oliver H. Cross'
SELECT "Party" FROM "table_18661" WHERE "Incumbent" = 'Oliver H. Cross'