CREATE TABLE table_18534 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What is the party where the incumbent is overton brooks?
SELECT "Party" FROM table_18534 WHERE "Incumbent" = 'Overton Brooks'
SELECT "Party" FROM "table_18534" WHERE "Incumbent" = 'Overton Brooks'