CREATE TABLE table_19753079_13 (incumbent VARCHAR2, party VARCHAR2, district VARCHAR2)

How many incumbents are there in the georgia 8 district when the party is democratic?
SELECT COUNT(incumbent) FROM table_19753079_13 WHERE party = "Democratic" AND district = "Georgia 8"
SELECT COUNT("incumbent") FROM "table_19753079_13" WHERE "Democratic" = "party" AND "Georgia 8" = "district"