CREATE TABLE table_59429 ("Classification" TEXT, "% of all" TEXT, "John Kerry" TEXT, "John Edwards" TEXT, "Dennis Kucinich" TEXT)

What is John Kerry, when John Edwards is '20%'?
SELECT "John Kerry" FROM table_59429 WHERE "John Edwards" = '20%'
SELECT "John Kerry" FROM "table_59429" WHERE "John Edwards" = '20%'