Amazon exec weighs in on proposed Staples-Office Depot merger

By Diane Bartz and Clarece Polke WASHINGTON (Reuters) - An executive with Amazon.com Inc's unit that sells office supplies to businesses gave testimony on Tuesday that appeared to bolster a U.S. regulator's wariness over a potential merger of Staples Inc and Office Depot Inc . The U.S. Federal Trade Commission filed a lawsuit last year to block the proposed $6.3 billion acquisition of Office Depot by Staples, arguing that it would hurt competition and lead to higher prices for consumers. The dec