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

### Instruction:
What is the percentage for Brown when the lead margin is 26?

### Inputs:
table_name: table, columns: ['Poll Source', 'Dates administered', 'Democrat: Brian Schweitzer', 'Republican: Roy Brown', 'Libertarian: Stan Jones', 'Lead Margin']

### Response:
SELECT Republican: Roy Brown FROM table WHERE Lead Margin = 26