CREATE TABLE table_48634 ("Source" TEXT, "Dates administered" TEXT, "Democrat: Christine Gregoire" TEXT, "Republican: Dino Rossi" TEXT, "Lead Margin" FLOAT)

What was the percentage for Republican: Dino Rossi when Democrat: Christine Gregoire polled at 53.7% and the lead margin was larger than 7?
SELECT "Republican: Dino Rossi" FROM table_48634 WHERE "Lead Margin" > '7' AND "Democrat: Christine Gregoire" = '53.7%'
SELECT "Republican: Dino Rossi" FROM "table_48634" WHERE "Democrat: Christine Gregoire" = '53.7%' AND "Lead Margin" > '7'