Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the highest Counties when Mitt Romney was the candidate with less than 0 delegates?

### Inputs:
table_name: table, columns: ['Candidate', 'Votes', 'Percentage', 'Counties', 'Delegates']

### Response:
SELECT MAX Counties FROM table WHERE Candidate = mitt romney AND Delegates < 0