CREATE TABLE table_204_951 (id DECIMAL, "candidate" TEXT, "votes" DECIMAL, "percentage" TEXT, "counties" DECIMAL, "delegates" DECIMAL)

what was the difference in votes between mccain and romney ?
SELECT ABS((SELECT "votes" FROM table_204_951 WHERE "candidate" = 'john mccain') - (SELECT "votes" FROM table_204_951 WHERE "candidate" = 'mitt romney'))
SELECT ABS((SELECT "votes" FROM "table_204_951" WHERE "candidate" = 'john mccain') - (SELECT "votes" FROM "table_204_951" WHERE "candidate" = 'mitt romney'))