CREATE TABLE table_1342013_34 (incumbent VARCHAR(255), candidates VARCHAR(255))
who is the the incumbent with candidates being john m. vorys (r) 61.5% jacob f. myers (d) 38.5%
    
SQL: SELECT incumbent FROM table_1342013_34 WHERE candidates = "John M. Vorys (R) 61.5% Jacob F. Myers (D) 38.5%"