user: Question: What is the highest Counties when mitt romney was the candidate with less than 0 delegates?
Columns: ['Candidate', 'Votes', 'Percentage', 'Counties', 'Delegates']
Types: ['text', 'real', 'text', 'real', 'real']
Sample row: ['John McCain', 701761.0, '36%', 45.0, 57.0]
SQL:

assistant: SELECT MAX("Counties") FROM "Table" WHERE "Candidate" = 'mitt romney' AND "Delegates" < 0.0;