CREATE TABLE table_17946 ("County" TEXT, "Kerry%" TEXT, "Kerry#" FLOAT, "Bush%" TEXT, "Bush#" FLOAT, "Others%" TEXT, "Others#" FLOAT)

When bush# is 3907, what is Kerry#?
SELECT "Kerry#" FROM table_17946 WHERE "Bush#" = '3907'
SELECT "Kerry#" FROM "table_17946" WHERE "Bush#" = '3907'