CREATE TABLE table_name_93 (incumbent VARCHAR, party VARCHAR, district VARCHAR)
SELECT incumbent FROM table_name_93 WHERE party = "democratic" AND district = "ohio 7"
ผู้ดำรงตำแหน่งประชาธิปไตยคนใดมาจากเขตโอไฮโอ 7
Which democratic incumbent is from the district of ohio 7?