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

### Instruction:
What was the lead margin when Nixon had 48% and reporting was done by Rasmussen Reports?

### Inputs:
table_name: table, columns: ['Poll Source', 'Dates administered', 'Democrat: Jay Nixon', 'Republican: Kenny Hulshof', 'Lead Margin']

### Response:
SELECT COUNT Lead Margin FROM table WHERE Democrat: Jay Nixon = 48% AND Poll Source = rasmussen reports