user: Question: What percentage did Walker win in Calumet county?
Columns: ['County', 'Won by', 'Walker %', 'Walker votes', 'Barrett %', 'Barrett votes']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Adams', 'Walker', 52.0, 3748.0, 46.0, 3298.0]
SQL:

assistant: SELECT "Walker %" FROM "Table" WHERE "County" = 'Calumet';