What rating has Senator Collins earned from the National Federation of Independent Business?

Yes. Senator Collins has the highest rating.

Small business are the cornerstone of Maine's economy. Senator Collins, whose family operates a fifth-generation lumber business in northern Maine, is a former regional Administrator of the Small Business Administration as well as the founding Director of the Center for Family Business at Husson College. Her record of strong support for small business has earned her a 100% rating from the National Federation of Independent Business, the nation's leading organizations of small businesses.

Bold italics are quotes from campaign literature.