CREATE TABLE table_20722805_1 (mccain_percentage VARCHAR, obama_percentage VARCHAR)

What was McCain's percentage when Obama had 64.39% of the vote?
SELECT mccain_percentage FROM table_20722805_1 WHERE obama_percentage = "64.39%"
SELECT "mccain_percentage" FROM "table_20722805_1" WHERE "64.39%" = "obama_percentage"