question: What's the number of McCain votes in the county where Obama got 35.7% and others got 1.9% of the votes?
answer: SELECT MIN(mccain_number) FROM table_20453681_1 WHERE obama_percentage = "35.7%" AND others_percentage = "1.9%"
context: CREATE TABLE table_20453681_1 (mccain_number INTEGER, obama_percentage VARCHAR, others_percentage VARCHAR)