CREATE TABLE table_21041 ("Poll Source" TEXT, "Dates administered" TEXT, "Democrat: Vivian Davis Figures" TEXT, "Republican: Jeff Sessions" TEXT, "Lead Margin" FLOAT)

On November 14, 2007, how many different Republican: Jeff Sessions are there?
SELECT COUNT("Republican: Jeff Sessions") FROM table_21041 WHERE "Dates administered" = 'November 14, 2007'
SELECT COUNT("Republican: Jeff Sessions") FROM "table_21041" WHERE "Dates administered" = 'November 14, 2007'