Martha Stewart's deal to sell merchandise to Macy's department stores raised questions about the future of her relationship with Sears Holdings Corp. (SHLD.O: Quote, Profile, Research), Sears Chairman Edward Lampert said on Wednesday.

Sears Holdings, which has sold Martha Stewart Everyday merchandise at its Kmart stores for years, decided not to carry the brand in its Sears chain for fear that the deal would not be renewed when it expires in four years, and the retailer would be forced to remove the goods.