Retailer says its decision to stop selling tobacco had an effect across the industry.
McDonald is expected to win confirmation, but will face tough questions about the agency
Secretary Ray Mabus has proposed banning tobacco sales on all Navy ships and bases.
The move could be an effort to bolster a rival mobile payment system.
CVS Caremark is siding with the pharmaceutical industry over the rising costs of specialty drugs.
Seven Democrats say Walmart should follow CVS Caremark's lead.